PATENT DOCUMENT

Abstract:
A digital logger system includes a multichannel interface circuit that:
       1. concurrently and continuously receives audio telecommunication signals for at least two telephone calls; and   2. continuously transmits linearly encoded digital audio data representing the received audio signals.
 
A Universal Serial Bus (“USB”) hub of the system receives the transmitted digital data for retransmission to a USB root hub. A USB root hub of personal computer (“PC”) receives transmitted digital data, and executes PC software which continuously monitors the digital data for embedded line status and signaling information including a telephone line “going off hook.” When a telephone line goes “off hook,” the software records both:
   1. an audio header that stores information about a telephone call; and   2. an audio file that stores compressed digital data for the telephone call.

Full Description:
COMPACT DISK APPENDIX 
     Appendix I hereto, comprising a pair of identical compact disks (“CD-Rs”), is hereby incorporated by reference. The accompanying pair of identical compact disks have the following characteristics.
         Machine Format: IBM-PC   Operating System Compatibility: MS-Windows NT 4.0       

     
       
         
               
             
               
               
               
             
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\Call Analyzer Source Code 
               
             
          
           
               
                 File Name 
                 Size 
                 Creation Date 
               
               
                   
               
             
          
           
               
                 AddressDlg.cpp 
                 9,001 
                 07/01/03 
                 08:07p 
               
               
                 AddressDlg.h 
                 1,837 
                 04/12/00 
                 07:09p 
               
               
                 AddressesDlg.cpp 
                 4,464 
                 09/25/03 
                 08:14a 
               
               
                 AddressesDlg.h 
                 1,849 
                 09/25/03 
                 08:13a 
               
               
                 AdvancedPropsDlg.cpp 
                 4,344 
                 07/01/03 
                 08:16p 
               
               
                 AdvancedPropsDlg.h 
                 1,669 
                 07/16/01 
                 09:55p 
               
               
                 AnalyzeDlg.cpp 
                 2,522 
                 10/21/03 
                 09:13p 
               
               
                 AnalyzeDlg.h 
                 1,356 
                 10/21/03 
                 09:13p 
               
               
                 AnalyzeNewFileThread.cpp 
                 4,633 
                 08/21/03 
                 11:13a 
               
               
                 AnalyzeNewFileThread.h 
                 1,495 
                 07/01/03 
                 08:07p 
               
               
                 appendoptions.cpp 
                 4,233 
                 11/08/03 
                 09:32p 
               
               
                 appendoptions.h 
                 1,388 
                 01/28/04 
                 08:08a 
               
               
                 AreaCodeRecordset.cpp 
                 2,843 
                 02/14/01 
                 03:29a 
               
               
                 AreaCodeRecordset.h 
                 1,401 
                 03/09/00 
                 03:40a 
               
               
                 AUPlayer.cpp 
                 6,870 
                 07/01/03 
                 08:16p 
               
               
                 AUPlayer.h 
                 1,642 
                 12/25/02 
                 10:12p 
               
               
                 Autorun.inf 
                 43 
                 05/25/00 
                 04:46p 
               
               
                 BusinessDBDoc.h 
                 0 
                 02/11/01 
                 06:01p 
               
               
                 calendar.cpp 
                 9,225 
                 04/03/00 
                 10:34p 
               
               
                 calendar.h 
                 3,457 
                 02/09/99 
                 05:29a 
               
               
                 CaliforniaBusinessDBSet.cpp 
                 3,026 
                 01/21/01 
                 07:07p 
               
               
                 CaliforniaBusinessDBSet.h 
                 1,944 
                 01/21/01 
                 07:11p 
               
               
                 CallList.cpp 
                 4,544 
                 08/07/03 
                 10:07a 
               
               
                 CallList.h 
                 2,038 
                 08/08/03 
                 03:38p 
               
               
                 CASAnalysisParams.cpp 
                 783 
                 07/01/03 
                 08:20p 
               
               
                 CASAnalysisParams.h 
                 1,113 
                 11/14/01 
                 01:19p 
               
               
                 CASOSPropPage.cpp 
                 8,142 
                 08/07/03 
                 10:10a 
               
               
                 CASOSPropPage.h 
                 1,668 
                 08/07/03 
                 10:18a 
               
               
                 CASOSRecordset.cpp 
                 3,371 
                 07/01/02 
                 08:20p 
               
               
                 CASOSRecordset.h 
                 1,661 
                 04/29/02 
                 06:00a 
               
               
                 CatalogFilterDlg.cpp 
                 2,980 
                 07/01/03 
                 08:07p 
               
               
                 CatalogFilterDlg.h 
                 1,656 
                 11/14/01 
                 02:25a 
               
               
                 cid.c 
                 19,095 
                 12/30/02 
                 07:16a 
               
               
                 DatabasePropPage.cpp 
                 5,753 
                 11/06/03 
                 11:52p 
               
               
                 DatabasePropPage.h 
                 1,684 
                 11/04/03 
                 11:01p 
               
               
                 DDC.H 
                 1,547 
                 10/18/94 
                 02:09p 
               
               
                 DDCMATH.H 
                 407 
                 04/25/00 
                 10:36p 
               
               
                 DialingRulesPropPage.cpp 
                 3,370 
                 07/01/03 
                 08:26p 
               
               
                 DialingRulesPropPage.h 
                 1,787 
                 07/01/03 
                 08:20p 
               
               
                 Dib.cpp 
                 19,212 
                 07/29/03 
                 09:45p 
               
               
                 Dib.h 
                 2,384 
                 07/29/03 
                 09:38p 
               
               
                 Directories.cpp 
                 5,548 
                 04/22/02 
                 01:01p 
               
               
                 DisplayFilterDlg.cpp 
                 14,055 
                 08/11/03 
                 12:27a 
               
               
                 DisplayFilterDlg.h 
                 1,895 
                 08/07/03 
                 10:19a 
               
               
                 DisplayPropPage.cpp 
                 11,810 
                 10/26/03 
                 08:47p 
               
               
                 DisplayPropPage.h 
                 1,952 
                 07/01/03 
                 08:07p 
               
               
                 DLIHeaderEditDlg.cpp 
                 14,068 
                 09/16/03 
                 08:18p 
               
               
                 DLIHeaderEditDlg.h 
                 2,859 
                 08/07/03 
                 11:21a 
               
               
                 DLIHeaderEditForm.cpp 
                 3,775 
                 02/05/03 
                 01:23p 
               
               
                 DLIHeaderEditForm.h 
                 1,961 
                 08/07/03 
                 10:10a 
               
               
                 dlilookup.cpp 
                 1,478 
                 12/14/01 
                 05:30p 
               
               
                 dlilookup.h 
                 1,850 
                 12/14/01 
                 05:30p 
               
               
                 DLILookup.tlh 
                 2,497 
                 11/15/01 
                 04:49p 
               
               
                 DLILookup.tli 
                 629 
                 11/15/01 
                 04:49p 
               
               
                 DLLC.tlh 
                 2,553 
                 04/10/02 
                 07:11p 
               
               
                 DLLC.tli 
                 1,149 
                 04/10/02 
                 07:11p 
               
               
                 DLLCd.tlh 
                 2,554 
                 04/10/02 
                 08:35a 
               
               
                 DLLCd.tli 
                 1,149 
                 04/10/02 
                 08:35a 
               
               
                 dtpicker.cpp 
                 9,701 
                 02/09/99 
                 04:18a 
               
               
                 dtpicker.h 
                 3,600 
                 02/09/99 
                 04:18a 
               
               
                 EBTreeListCtrl.cpp 
                 3,632 
                 08/31/03 
                 10:22a 
               
               
                 EBTreeListCtrl.h 
                 1,203 
                 08/31/03 
                 10:21a 
               
               
                 EndBtn.cpp 
                 2,509 
                 07/01/03 
                 08:07p 
               
               
                 EndBtn.h 
                 1,264 
                 12/28/99 
                 02:10a 
               
               
                 EQView.cpp 
                 1,723 
                 07/01/03 
                 08:07p 
               
               
                 EQView.h 
                 1,587 
                 01/09/00 
                 04:05p 
               
               
                 EvidenceBuilder.clw 
                 39,852 
                 02/24/04 
                 11:51a 
               
               
                 EvidenceBuilder.cpp 
                 17,079 
                 11/04/03 
                 11:04p 
               
               
                 EvidenceBuilder.dsp 
                 18,097 
                 02/17/04 
                 07:06a 
               
               
                 EvidenceBuilder.dsw 
                 553 
                 07/01/03 
                 08:04p 
               
               
                 EvidenceBuilder.h 
                 1,749 
                 09/22/03 
                 12:44p 
               
               
                 EvidenceBuilder.plg 
                 8,411 
                 03/17/04 
                 11:06p 
               
               
                 EvidenceBuilder.rc 
                 101,300 
                 02/24/04 
                 11:51a 
               
               
                 EvidenceBuilderdoc.cpp 
                 142,485 
                 10/28/03 
                 10:10p 
               
               
                 EvidenceBuilderDoc.h 
                 15,128 
                 10/27/03 
                 08:57p 
               
               
                 EvidenceBuilderView.cpp 
                 259,732 
                 03/17/04 
                 11:37p 
               
               
                 EvidenceBuilderView.h 
                 15,325 
                 03/02/04 
                 01:40p 
               
               
                 Fftmisc.cpp 
                 1,964 
                 12/27/99 
                 05:08p 
               
               
                 FilterDlg.cpp 
                 13,179 
                 07/01/03 
                 08:00p 
               
               
                 font.cpp 
                 2,098 
                 02/09/99 
                 05:29a 
               
               
                 font.h 
                 1,042 
                 02/09/99 
                 05:29a 
               
               
                 FontPropertyPage.cpp 
                 12,380 
                 07/01/03 
                 08:26p 
               
               
                 FontPropertyPage.h 
                 2,017 
                 07/01/03 
                 08:22p 
               
               
                 FontPropPage.cpp 
                 1,139 
                 06/28/00 
                 04:36p 
               
               
                 FontPropPage.h 
                 1,369 
                 06/28/00 
                 04:36p 
               
               
                 FOURIER.H 
                 2,892 
                 06/26/00 
                 05:29p 
               
               
                 Fourierd.cpp 
                 9,183 
                 06/26/00 
                 05:28p 
               
               
                 Globals.cpp 
                 22,344 
                 11/04/03 
                 10:57p 
               
               
                 Globals.h 
                 10,137 
                 11/04/03 
                 11:04p 
               
               
                 HelpDoc.cpp 
                 1,363 
                 07/01/03 
                 08:00p 
               
               
                 HelpDoc.h 
                 1,361 
                 07/10/00 
                 01:37p 
               
               
                 HelpFrame.cpp 
                 3,146 
                 09/01/03 
                 12:57p 
               
               
                 HelpFrame.h 
                 1,458 
                 09/01/03 
                 12:57p 
               
               
                 HelpView.cpp 
                 4,737 
                 07/01/03 
                 08:00p 
               
               
                 HelpView.h 
                 2,359 
                 02/09/99 
                 03:48a 
               
               
                 InternicPropPage.cpp 
                 8,368 
                 03/03/04 
                 11:10p 
               
               
                 InternicPropPage.h 
                 1,952 
                 08/07/03 
                 11:21a 
               
               
                 InternicRecordset.cpp 
                 2,971 
                 07/01/03 
                 08:00p 
               
               
                 InternicRecordset.h 
                 1,553 
                 02/12/01 
                 07:11p 
               
               
                 LineCalculator.cpp 
                 3,230 
                 10/28/03 
                 10:10p 
               
               
                 LineCalculator.h 
                 1,286 
                 10/27/03 
                 08:55p 
               
               
                 ListViewFrame.cpp 
                 4,253 
                 09/01/03 
                 07:13a 
               
               
                 ListViewFrame.h 
                 2,155 
                 08/07/03 
                 11:31a 
               
               
                 MainFrm.cpp 
                 14,340 
                 10/01/03 
                 11:33a 
               
               
                 MainFrm.h 
                 2,150 
                 09/22/03 
                 01:00p 
               
               
                 MakeHelp.bat 
                 1,408 
                 12/17/99 
                 02:56a 
               
               
                 MIL_DTMF.dat 
                 129 
                 07/01/03 
                 09:36a 
               
               
                 MIL2400ConfigDlg.cpp 
                 29,187 
                 07/01/03 
                 08:00p 
               
               
                 MIL2400ConfigDlg.h 
                 3,558 
                 05/12/03 
                 05:20a 
               
               
                 MILAddressPropPage.cpp 
                 10,588 
                 08/08/03 
                 09:23p 
               
               
                 MILAddressPropPage.h 
                 2,022 
                 08/07/03 
                 10:31a 
               
               
                 MILAddressRecordset.cpp 
                 4,211 
                 09/18/03 
                 12:48p 
               
               
                 MILAddressRecordset.h 
                 1,690 
                 02/11/01 
                 05:59p 
               
               
                 MILCatalogingException.cpp 
                 901 
                 07/01/03 
                 08:00p 
               
               
                 MILCatalogingException.h 
                 1,070 
                 10/22/01 
                 02:40a 
               
               
                 MILStringArray.h 
                 606 
                 12/27/99 
                 05:32a 
               
               
                 ModelessErrorMsgDlg.h 
                 1,366 
                 11/08/01 
                 06:36p 
               
               
                 ModelessErrorMsgDlg.cpp 
                 1,528 
                 08/23/00 
                 03:26a 
               
               
                 MVC3AE.tmp 
                 12,368 
                 02/14/01 
                 03:36p 
               
               
                 NewFileMonitorThread.h 
                 1,879 
                 07/01/03 
                 08:00p 
               
               
                 NewFileMonitorThread.cpp 
                 11,245 
                 08/29/03 
                 11:51a 
               
               
                 NotesSearchParamsDlg.h 
                 1,314 
                 12/12/02 
                 05:10p 
               
               
                 NotesSearchParamsDlg.cpp 
                 2,675 
                 08/08/03 
                 03:34p 
               
               
                 ODButton.cpp 
                 19,800 
                 07/17/01 
                 04:35p 
               
               
                 ODButton.h 
                 4,036 
                 07/17/01 
                 04:14p 
               
               
                 paul_cid.dsp 
                 4,300 
                 04/18/00 
                 10:45p 
               
               
                 PauseBtn.cpp 
                 2,447 
                 07/01/03 
                 08:00p 
               
               
                 PauseBtn.h 
                 1,279 
                 12/28/99 
                 02:10a 
               
               
                 picture.cpp 
                 1,128 
                 02/09/99 
                 04:18a 
               
               
                 picture.h 
                 1,295 
                 02/09/99 
                 04:18a 
               
               
                 PlayBtn.cpp 
                 2,283 
                 07/01/03 
                 08:00p 
               
               
                 PlayBtn.h 
                 1,271 
                 12/28/99 
                 02:10a 
               
               
                 PlayBuffer.cpp 
                 1,988 
                 07/01/03 
                 08:00p 
               
               
                 PlayBuffer.h 
                 748 
                 12/25/02 
                 09:43p 
               
               
                 PlayPosSlider.cpp 
                 1,117 
                 07/01/03 
                 08:00p 
               
               
                 PlayPosSlider.h 
                 1,274 
                 12/28/99 
                 10:07p 
               
               
                 PreFilterDlg.cpp 
                 27,524 
                 10/09/03 
                 03:19p 
               
               
                 PreFilterDlg.h 
                 2,747 
                 09/24/03 
                 08:54p 
               
               
                 prefix.csv 
                 2,904,046 
                 07/10/00 
                 12:37p 
               
               
                 prefix1.csv 
                 370,875 
                 05/08/00 
                 08:45p 
               
               
                 PrefixRecordset.cpp 
                 3,649 
                 07/01/03 
                 08:00p 
               
               
                 PrefixRecordset.h 
                 1,397 
                 07/21/00 
                 04:48p 
               
               
                 PrefsDlg.cpp 
                 11,405 
                 07/01/03 
                 08:22p 
               
               
                 PrefsDlg.h 
                 1,829 
                 07/01/03 
                 08:00p 
               
               
                 PrefsPropSheet.cpp 
                 2,784 
                 07/01/03 
                 08:00p 
               
               
                 PrefsPropSheet.h 
                 1,928 
                 07/01/03 
                 08:00p 
               
               
                 PrintColHdr.cpp 
                 1,191 
                 07/01/03 
                 08:00p 
               
               
                 PrintColHdr.h 
                 1,236 
                 06/08/02 
                 05:10p 
               
               
                 RCa00772 
                 132,904 
                 02/14/01 
                 06:02p 
               
               
                 RCa77983 
                 123,298 
                 07/11/00 
                 06:09p 
               
               
                 ReadMe.txt 
                 14,476 
                 12/23/02 
                 08:48a 
               
               
                 RecordingListView.cpp 
                 6,255 
                 09/23/03 
                 10:47a 
               
               
                 RecordingListView.h 
                 2,464 
                 08/07/03 
                 11:30a 
               
               
                 resource.h 
                 21,012 
                 11/06/03 
                 11:44p 
               
               
                 SaveVersionDlg.cpp 
                 2,133 
                 07/01/03 
                 08:00p 
               
               
                 SaveVersionDlg.h 
                 1,649 
                 07/04/00 
                 03:16a 
               
               
                 SelectDriveDlg.cpp 
                 2,404 
                 07/01/03 
                 08:00p 
               
               
                 SelectDriveDlg.h 
                 1,395 
                 10/25/01 
                 10:42p 
               
               
                 SelectFolderDlg.cpp 
                 1,301 
                 07/01/03 
                 08:00p 
               
               
                 SelectFolderDlg.h 
                 1,291 
                 04/03/00 
                 10:34p 
               
               
                 SelectFolderNameDlg.cpp 
                 1,521 
                 07/28/03 
                 09:37a 
               
               
                 SelectFolderNameDlg.h 
                 1,381 
                 10/26/01 
                 03:55p 
               
               
                 SelectSearchedCallsDlg.cpp 
                 11,321 
                 10/02/03 
                 09:47p 
               
               
                 SelectSearchedCallsDlg.h 
                 1,823 
                 10/02/03 
                 09:34p 
               
               
                 SetUserFieldsDlg.cpp 
                 2,468 
                 07/01/03 
                 08:00p 
               
               
                 SetuserFieldsDlg.h 
                 1,337 
                 04/12/00 
                 07:09p 
               
               
                 Splash.cpp 
                 3,228 
                 07/11/00 
                 04:18p 
               
               
                 Splash.h 
                 1,159 
                 06/26/00 
                 06:50p 
               
               
                 StartBtn.cpp 
                 2,535 
                 07/01/03 
                 08:00p 
               
               
                 StartBtn.h 
                 1,279 
                 12/28/99 
                 02:10a 
               
               
                 StdAfx.cpp 
                 376 
                 07/28/03 
                 09:33a 
               
               
                 StdAfx.h 
                 3,606 
                 10/25/03 
                 08:46p 
               
               
                 StepBackBtn.cpp 
                 2,559 
                 07/01/03 
                 08:00p 
               
               
                 StepBackBtn.h 
                 1,309 
                 12/29/99 
                 12:22a 
               
               
                 StepFwdBtn.cpp 
                 2,546 
                 07/01/03 
                 08:00p 
               
               
                 StepFwdBtn.h 
                 1,299 
                 12/29/99 
                 12:22a 
               
               
                 StopBtn.cpp 
                 2,511 
                 07/01/03 
                 08:00p 
               
               
                 StopBtn.h 
                 1,271 
                 12/28/99 
                 02:10a 
               
               
                 ToEndBtn.cpp 
                 2,535 
                 07/01/03 
                 08:00p 
               
               
                 ToEndBtn.h 
                 1,246 
                 04/29/02 
                 06:27a 
               
               
                 TraceDlg.cpp 
                 996 
                 07/01/03 
                 08:00p 
               
               
                 TraceDlg.h 
                 1,297 
                 10/31/01 
                 03:58a 
               
               
                 WaveformWnd.cpp 
                 702 
                 10/23/03 
                 08:09p 
               
               
                 WaveformWnd.h 
                 1,167 
                 10/23/03 
                 08:23p 
               
               
                 WBlinds.h 
                 13,588 
                 06/07/03 
                 10:38a 
               
               
                 xTurboDLL.h 
                 1,113 
                 08/31/03 
                 10:26a 
               
               
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\Call Analyzer Source Code\Help 
               
             
          
           
               
                   
                 File Name 
                 Size 
                 Creation Date 
               
               
                   
                   
               
             
          
           
               
                   
                 address_lookup.htm 
                 3,207 
                 05/17/02 
                 06:46a 
               
               
                   
                 catalog_hard_drive.htm 
                 3,312 
                 06/26/03 
                 06:49a 
               
               
                   
                 config_MIL-2400.htm 
                 9,226 
                 06/26/03 
                 06:42a 
               
               
                   
                 copyCD.htm 
                 2,078 
                 04/20/01 
                 03:45a 
               
               
                   
                 filter_calls.htm 
                 3,403 
                 07/14/00 
                 11:40p 
               
               
                   
                 getting_started.htm 
                 8,924 
                 06/26/03 
                 06:49a 
               
               
                   
                 help_start.htm 
                 5,662 
                 06/26/03 
                 06:42a 
               
               
                   
                 index.htm 
                 812 
                 04/20/01 
                 04:14a 
               
               
                   
                 notes_searching.htm 
                 3,699 
                 06/11/03 
                 01:53p 
               
               
                   
                 page_header.htm 
                 1,987 
                 06/26/03 
                 06:49a 
               
               
                   
                 play_call.htm 
                 5,099 
                 05/16/02 
                 09:25p 
               
               
                   
                 prefs.htm 
                 6,787 
                 06/26/03 
                 06:55a 
               
               
                   
                 printing.htm 
                 5,978 
                 05/17/02 
                 06:42a 
               
               
                   
                 rollover.js 
                 974 
                 04/30/00 
                 10:02p 
               
               
                   
                 send_files.htm 
                 4,687 
                 05/17/02 
                 06:35a 
               
               
                   
                 sort_calls.htm 
                 2,094 
                 11/20/01 
                 02:28p 
               
               
                   
                 troubleshooting.htm 
                 8,291 
                 06/26/03 
                 06:55a 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\Call Analyzer Source 
               
               
                 Code\TurboDLL_src\TurboDLL 
               
             
          
           
               
                   
                 File Name 
                 Size 
                 Creation Date 
               
               
                   
                   
               
             
          
           
               
                   
                 Affine.cpp 
                 5,161 
                 05/10/00 
                 09:43p 
               
               
                   
                 Affine.h 
                 3,011 
                 05/10/00 
                 10:31p 
               
               
                   
                 BitmapInfo.cpp 
                 4,389 
                 05/10/00 
                 10:06p 
               
               
                   
                 BitmapInfo.h 
                 1,475 
                 05/10/00 
                 10:31p 
               
               
                   
                 Color.cpp 
                 2,916 
                 05/10/00 
                 10:06p 
               
               
                   
                 Color.h 
                 2,776 
                 05/10/00 
                 10:31p 
               
               
                   
                 Dib.cpp 
                 28,298 
                 11/04/03 
                 10:31p 
               
               
                   
                 Dib.h 
                 6,451 
                 05/11/00 
                 10:03p 
               
               
                   
                 dTurboDLL.def 
                 193 
                 08/31/03 
                 12:43p 
               
               
                   
                 filedialog.cpp 
                 3,098 
                 05/10/00 
                 10:06p 
               
               
                   
                 filedialog.h 
                 1,486 
                 05/10/00 
                 10:31p 
               
               
                   
                 ReadMe.txt 
                 310 
                 09/20/02 
                 10:23p 
               
               
                   
                 resource.h 
                 1,242 
                 11/04/03 
                 10:30p 
               
               
                   
                 StdAfx.cpp 
                 210 
                 12/05/01 
                 05:19p 
               
               
                   
                 StdAfx.h 
                 1,470 
                 01/07/02 
                 10:53a 
               
               
                   
                 TLCDragWnd.cpp 
                 28,970 
                 07/15/02 
                 10:56p 
               
               
                   
                 TLCDragWnd.h 
                 2,402 
                 03/17/02 
                 03:52p 
               
               
                   
                 TLCDropWnd.cpp 
                 3,786 
                 07/15/02 
                 10:59p 
               
               
                   
                 TLCDropWnd.h 
                 1,527 
                 02/07/02 
                 09:48p 
               
               
                   
                 TLHDragWnd.cpp 
                 7,887 
                 07/15/02 
                 10:58p 
               
               
                   
                 TLHDragWnd.h 
                 1,676 
                 02/20/02 
                 10:52a 
               
               
                   
                 TLHDropWnd.cpp 
                 4,491 
                 07/15/02 
                 10:59p 
               
               
                   
                 TLHDropWnd.h 
                 1,683 
                 12/28/01 
                 08:33p 
               
               
                   
                 TreeListColumnInfo.cpp 
                 4,478 
                 02/01/02 
                 11:50p 
               
               
                   
                 TreeListColumnInfo.h 
                 4,462 
                 02/01/02 
                 11:49p 
               
               
                   
                 TreeListComboCtrl.cpp 
                 1,262 
                 02/01/02 
                 11:39p 
               
               
                   
                 TreeListComboCtrl.h 
                 1,308 
                 02/01/02 
                 02:45a 
               
               
                   
                 TreeListCtrl.cpp 
                 152,495 
                 12/03/03 
                 11:06p 
               
               
                   
                 TreeListCtrl.h 
                 26,539 
                 11/23/03 
                 08:42p 
               
               
                   
                 TreeListDC.cpp 
                 1,361 
                 12/31/01 
                 05:18p 
               
               
                   
                 TreeListDC.h 
                 835 
                 09/19/02 
                 08:49p 
               
               
                   
                 TreeListEditCtrl.cpp 
                 1,269 
                 02/01/02 
                 11:39p 
               
               
                   
                 TreeListEditCtrl.h 
                 1,326 
                 01/31/02 
                 02:44p 
               
               
                   
                 TreeListHeaderCtrl.cpp 
                 31,035 
                 11/23/03 
                 09:22p 
               
               
                   
                 TreeListHeaderCtrl.h 
                 4,502 
                 09/19/02 
                 08:49p 
               
               
                   
                 TreeListItem.cpp 
                 4,948 
                 03/19/02 
                 07:48p 
               
               
                   
                 TreeListItem.h 
                 2,922 
                 08/31/03 
                 01:46p 
               
               
                   
                 TreeListResource.cpp 
                 547 
                 12/11/01 
                 10:50a 
               
               
                   
                 TreeListResource.h 
                 610 
                 12/11/01 
                 10:38a 
               
               
                   
                 TreeListStaticCtrl.h 
                 1,481 
                 06/20/02 
                 08:34p 
               
               
                   
                 TreeListStaticCtrl.cpp 
                 2,541 
                 02/07/02 
                 03:22a 
               
               
                   
                 TreeListTipCtrl.cpp 
                 10,206 
                 03/17/02 
                 08:03p 
               
               
                   
                 TreeListTipCtrl.h 
                 2,581 
                 01/16/02 
                 10:10a 
               
               
                   
                 TurboDLL.clw 
                 2,358 
                 07/19/02 
                 03:28p 
               
               
                   
                 TurboDLL.cpp 
                 1,833 
                 12/11/01 
                 10:50a 
               
               
                   
                 TurboDLL.def 
                 190 
                 12/05/01 
                 05:19p 
               
               
                   
                 TurboDLL.dep 
                 3,673 
                 07/16/02 
                 10:35p 
               
               
                   
                 TurboDLL.dsp 
                 8,427 
                 11/04/03 
                 11:11p 
               
               
                   
                 TurboDLL.dsw 
                 539 
                 12/05/01 
                 05:21p 
               
               
                   
                 TurboDLL.h 
                 201 
                 12/11/01 
                 10:50a 
               
               
                   
                 TurboDLL.mak 
                 11,152 
                 08/31/03 
                 12:36p 
               
               
                   
                 TurboDLL.plg 
                 3,508 
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                 09:14p 
               
               
                   
                 TurboDLL.rc 
                 5,011 
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                 10:30p 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\Call Analyzer Source 
               
               
                 Code\TurboDLL_src\TurboDLL\RES 
               
             
          
           
               
                   
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                 Size 
                 Creation Date 
               
               
                   
                   
               
             
          
           
               
                   
                 TurboDLL.rc2 
                 400 
                 12/05/01 
                 05:19p 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\Call Analyzer Source 
               
               
                 Code\TurboDLL_src\TurboDemo 
               
             
          
           
               
                   
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                 Size 
                 Creation Date 
               
               
                   
                   
               
             
          
           
               
                   
                 ReadMe.txt 
                 3,633 
                 09/19/02 
                 09:11p 
               
               
                   
                 Resource.h 
                 730 
                 09/20/02 
                 10:12p 
               
               
                   
                 StdAfx.cpp 
                 211 
                 09/19/02 
                 09:11p 
               
               
                   
                 StdAfx.h 
                 1,092 
                 09/19/02 
                 09:22p 
               
               
                   
                 TurboDemo.clw 
                 1,414 
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                 10:13p 
               
               
                   
                 TurboDemo.cpp 
                 2,105 
                 09/19/02 
                 09:11p 
               
               
                   
                 TurboDemo.dsp 
                 4,677 
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                 09:49p 
               
               
                   
                 TurboDemo.dsw 
                 541 
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                 09:11p 
               
               
                   
                 TurboDemo.h 
                 1,357 
                 09/19/02 
                 09:11p 
               
               
                   
                 TurboDemo.plg 
                 4,266 
                 09/20/02 
                 11:17p 
               
               
                   
                 TurboDemo.rc 
                 5,581 
                 09/20/02 
                 10:12p 
               
               
                   
                 TurboDemoDlg.cpp 
                 7,052 
                 09/20/02 
                 10:12p 
               
               
                   
                 TurboDemoDlg.h 
                 1,353 
                 09/20/02 
                 10:11p 
               
               
                   
                 TurboDragDlg.cpp 
                 9,814 
                 09/20/02 
                 10:15p 
               
               
                   
                 TurboDragDlg.h 
                 1,363 
                 09/20/02 
                 10:13p 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\Call Analyzer Source 
               
               
                 Code\TurboDLL_src\TurboDemo\res 
               
             
          
           
               
                   
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                 Size 
                 Creation Date 
               
               
                   
                   
               
             
          
           
               
                   
                 TurboDemo.rc2 
                 401 
                 09/19/02 
                 09:11p 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\Call Analyzer Source Code\res 
               
             
          
           
               
                   
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                 Size 
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                 EvidenceBuilder.rc2 
                 407 
                 07/01/03 
                 08:07p 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
             
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\Main Product Source Code 
               
             
          
           
               
                 File Name 
                 Size 
                 Creation Date 
               
               
                   
               
             
          
           
               
                 AboutDlg.cpp 
                 454 
                 04/13/03 
                 07:59p 
               
               
                 AboutDlg.h 
                 504 
                 04/13/03 
                 08:08p 
               
               
                 areafill.cpp 
                 9,893 
                 11/17/03 
                 10:45p 
               
               
                 areafill.h 
                 2,725 
                 11/05/03 
                 12:43p 
               
               
                 AudioDeviceMappingDlg.cpp 
                 6,618 
                 12/11/03 
                 10:55a 
               
               
                 AudioDeviceMappingDlg.h 
                 1,772 
                 06/02/03 
                 09:22p 
               
               
                 Buffer.h 
                 2,959 
                 04/23/03 
                 07:23p 
               
               
                 ChannelSettingsDlg.cpp 
                 22,815 
                 11/18/03 
                 08:19p 
               
               
                 ChannelSettingsDlg.h 
                 3,325 
                 06/14/03 
                 09:13a 
               
               
                 ChannelWnd.cpp 
                 51,238 
                 01/08/04 
                 02:59p 
               
               
                 ChannelWnd.h 
                 4,734 
                 01/07/04 
                 01:02p 
               
               
                 Color.cpp 
                 2,916 
                 05/10/00 
                 10:06p 
               
               
                 Color.h 
                 2,776 
                 05/10/00 
                 10:31p 
               
               
                 CxSkinButton.htm 
                 5,585 
                 10/27/01 
                 09:01p 
               
               
                 DefaultAudioDeviceSelectionDlg.cpp 
                 2,811 
                 01/06/04 
                 10:19p 
               
               
                 DefaultAudioDeviceSelectionDlg.h 
                 1,500 
                 01/06/04 
                 10:08p 
               
               
                 Defines.h 
                 1,030 
                 01/06/04 
                 04:18p 
               
               
                 DeviceList.cpp 
                 3,889 
                 08/12/03 
                 05:32a 
               
               
                 DeviceList.h 
                 1,206 
                 08/11/03 
                 09:57p 
               
               
                 devnode.c 
                 5,834 
                 05/30/03 
                 08:35p 
               
               
                 enum.cpp 
                 53,351 
                 06/20/03 
                 06:01a 
               
               
                 Globals.cpp 
                 135 
                 04/13/03 
                 07:31p 
               
               
                 Globals.h 
                 1,286 
                 01/07/04 
                 09:19a 
               
               
                 hidport.h.bak 
                 5,041 
                 07/26/00 
                 10:33a 
               
               
                 main.cpp 
                 767 
                 10/29/03 
                 08:20p 
               
               
                 MIL8000U.clw 
                 6,123 
                 01/08/04 
                 03:00p 
               
               
                 MIL8000U.cpp 
                 8,006 
                 01/08/04 
                 02:15p 
               
               
                 MIL8000U.dsp 
                 10,575 
                 01/06/04 
                 11:44p 
               
               
                 MIL8000U.h 
                 1,286 
                 07/12/03 
                 10:27p 
               
               
                 MIL8000U.plg 
                 252 
                 01/08/04 
                 03:18p 
               
               
                 MIL8000U.rc 
                 22,330 
                 01/08/04 
                 03:00p 
               
               
                 MIL8000UDlg.cpp 
                 14,648 
                 01/07/04 
                 09:04a 
               
               
                 MIL8000UDlg.h 
                 2,408 
                 01/06/04 
                 04:18p 
               
               
                 resource.h 
                 11,552 
                 01/06/04 
                 09:46p 
               
               
                 SetupWizardIntroPage.cpp 
                 1,260 
                 04/16/03 
                 07:01a 
               
               
                 SetupWizardIntroPage.h 
                 1,336 
                 04/16/03 
                 07:05a 
               
               
                 SetupWizardSheet.cpp 
                 1,072 
                 04/16/03 
                 07:02a 
               
               
                 SetupWizardSheet.h 
                 1,409 
                 04/16/03 
                 07:02a 
               
               
                 StdAfx.cpp 
                 600 
                 12/11/03 
                 11:51a 
               
               
                 StdAfx.h 
                 1,981 
                 11/19/03 
                 01:03p 
               
               
                 StereoWaveIn.cpp 
                 2,286 
                 04/23/03 
                 07:28p 
               
               
                 StereoWaveIn.h 
                 1,449 
                 05/11/03 
                 12:11p 
               
               
                 ThresholdArrow.cpp 
                 726 
                 04/10/03 
                 08:36p 
               
               
                 ThresholdArrow.h 
                 1,202 
                 04/10/03 
                 08:36p 
               
               
                 TitleTip.cpp 
                 4,160 
                 11/21/02 
                 01:17p 
               
               
                 TitleTip.h 
                 985 
                 02/04/03 
                 08:59a 
               
               
                 TwoColorStatic.cpp 
                 2,081 
                 04/14/03 
                 07:06a 
               
               
                 TwoColorStatic.h 
                 1,184 
                 04/10/03 
                 12:52p 
               
               
                 USBAudioPortMapper.h 
                 1,644 
                 11/18/03 
                 08:08p 
               
               
                 USBAudioPortMapper.cpp 
                 16,985 
                 11/18/03 
                 08:17p 
               
               
                 usbdesc.h 
                 9,258 
                 07/26/00 
                 10:34a 
               
               
                 usbid.cpp 
                 9,824 
                 10/29/03 
                 08:23p 
               
               
                 usbid.dsp 
                 4,193 
                 10/18/03 
                 11:21p 
               
               
                 usbid.dsw 
                 533 
                 10/17/03 
                 10:01p 
               
               
                 usbid.h 
                 229 
                 10/29/03 
                 08:21p 
               
               
                 usbid.plg 
                 1,198 
                 10/30/03 
                 05:44p 
               
               
                 usbview.h 
                 5,718 
                 05/22/03 
                 10:17p 
               
               
                 VUMeter.cpp 
                 34,126 
                 01/07/04 
                 12:36p 
               
               
                 VUMeter.h 
                 2,537 
                 01/07/04 
                 09:17a 
               
               
                 WaveInMgr.cpp 
                 10,933 
                 01/07/04 
                 01:00p 
               
               
                 WaveInMgr.h 
                 1,350 
                 04/22/03 
                 09:33a 
               
               
                 WaveInThread.cpp 
                 2,508 
                 01/06/04 
                 10:35p 
               
               
                 WaveInThread.h 
                 1,708 
                 06/01/03 
                 02:44p 
               
               
                 xSkinButton.cpp 
                 25,865 
                 04/16/03 
                 01:05p 
               
               
                 xSkinButton.h 
                 3,524 
                 04/16/03 
                 01:06p 
               
               
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\Main Product Source Code\CxSkinButton_demo 
               
             
          
           
               
                   
                 File Name 
                 Size 
                 Creation Date 
               
               
                   
                   
               
             
          
           
               
                   
                 CxSkinButtonDemo.clw 
                 2,133 
                 06/24/01 
                 07:13p 
               
               
                   
                 CxSkinButtonDemo.cpp 
                 1,601 
                 03/19/01 
                 08:06p 
               
               
                   
                 CxSkinButtonDemo.dsw 
                 646 
                 03/29/01 
                 08:22a 
               
               
                   
                 CxSkinButtonDemo.dsp 
                 6,594 
                 06/24/01 
                 06:41p 
               
               
                   
                 CxSkinButtonDemo.h 
                 1,292 
                 03/19/01 
                 08:06p 
               
               
                   
                 CxSkinButtonDemo.rc 
                 7,243 
                 06/24/01 
                 07:13p 
               
               
                   
                 CxSkinButtonDemoDlg.h 
                 1,774 
                 06/24/01 
                 05:31p 
               
               
                   
                 CxSkinButtonDemoDlg.cpp 
                 4,687 
                 06/24/01 
                 06:19p 
               
               
                   
                 resource.h 
                 2,413 
                 06/24/01 
                 06:19p 
               
               
                   
                 StdAfx.cpp 
                 218 
                 03/19/01 
                 08:06p 
               
               
                   
                 StdAfx.h 
                 1,054 
                 03/19/01 
                 08:06p 
               
               
                   
                 xSkinButton.cpp 
                 25,655 
                 10/27/01 
                 08:54p 
               
               
                   
                 xSkinButton.h 
                 3,435 
                 10/27/01 
                 08:54p 
               
               
                   
                 xStaticText.cpp 
                 5,826 
                 03/31/01 
                 07:58a 
               
               
                   
                 xStaticText.h 
                 1,746 
                 03/31/01 
                 07:55a 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\Main Product Source 
               
               
                 Code\CxSkinButton_demo\doc 
               
             
          
           
               
                   
                 File Name 
                 Size 
                 Creation Date 
               
               
                   
                   
               
             
          
           
               
                   
                 CxSkinButton.htm 
                 5,586 
                 10/27/01 
                 08:58p 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\Main Product Source Code\CxSkinButton_demo\res 
               
             
          
           
               
                   
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                 CxSkinButtonDemo.rc2 
                 408 
                 03/19/01 
                 08:06p 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
             
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\Main Product Source Code\Help 
               
             
          
           
               
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                 Size 
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                 Copy of MIL-8000 Help.htm 
                 58,397 
                 07/12/03 
                 09:59p 
               
               
                 MIL-8000 Help.htm 
                 376,146 
                 01/08/04 
                 03:09p 
               
               
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\Main Product Source Code\Help\Copy of MIL-8000 
               
               
                 Help_files 
               
             
          
           
               
                   
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                 filelist.xml 
                 1,036 
                 07/12/03 
                 09:59p 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\Main Product Source Code\Help\Copy of images 
               
             
          
           
               
                   
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                 588 
                 07/10/03 
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                 List of files for directory 
               
               
                 \Digital_Logger\Main Product Source Code\Help\MIL-8000 Help_files 
               
             
          
           
               
                   
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                 Size 
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                 filelist.xml 
                 2,092 
                 01/08/04 
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                 List of files for directory 
               
               
                 \Digital_Logger\Main Product Source Code\Help\images.bak 
               
             
          
           
               
                   
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                 588 
                 07/10/03 
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                 List of files for directory 
               
               
                 \Digital_Logger\Main Product Source Code\res 
               
             
          
           
               
                   
                 File Name 
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                 MIL8000U.rc2 
                 400 
                 04/09/03 
                 01:19p 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\T1 Logger Source Code 
               
             
          
           
               
                   
                 File Name 
                 Size 
                 Creation Date 
               
               
                   
                   
               
             
          
           
               
                   
                 ATT01413.txt 
                 86 
                 04/01/04 
                 09:33a 
               
               
                   
                 ChannelManager.cpp 
                 22,165 
                 11/20/03 
                 07:48a 
               
               
                   
                 ChannelManager.h 
                 3,682 
                 11/20/03 
                 07:48a 
               
               
                   
                 ChannelModes.h 
                 174 
                 11/20/03 
                 07:48a 
               
               
                   
                 ChannelModes.old 
                 174 
                 11/20/03 
                 07:48a 
               
               
                   
                 Channels.cpp 
                 12,048 
                 11/20/03 
                 07:48a 
               
               
                   
                 common.cpp 
                 7,098 
                 11/20/03 
                 07:48a 
               
               
                   
                 ErrMsgApp.h 
                 2,572 
                 11/20/03 
                 07:48a 
               
               
                   
                 ErrMsgApp.mc 
                 1,956 
                 11/20/03 
                 07:48a 
               
               
                   
                 IniFile.cpp 
                 5,356 
                 11/20/03 
                 07:48a 
               
               
                   
                 IniFile.h 
                 1,226 
                 11/20/03 
                 07:48a 
               
               
                   
                 logger.rc 
                 3,327 
                 11/20/03 
                 07:48a 
               
               
                   
                 Logger24.cpp 
                 2,627 
                 11/20/03 
                 07:48a 
               
               
                   
                 Logger24.h 
                 1,245 
                 11/20/03 
                 07:48a 
               
               
                   
                 main.cpp 
                 5,713 
                 11/20/03 
                 07:48a 
               
               
                   
                 make_package.bat 
                 338 
                 11/20/03 
                 07:48a 
               
               
                   
                 Message.h 
                 2,370 
                 11/20/03 
                 07:48a 
               
               
                   
                 Purge.cpp 
                 7,534 
                 11/20/03 
                 07:48a 
               
               
                   
                 PurgeChannel.cpp 
                 12,898 
                 11/20/03 
                 07:48a 
               
               
                   
                 PurgeChannel.h 
                 2,437 
                 11/20/03 
                 07:48a 
               
               
                   
                 PurgeDrive.cpp 
                 5,675 
                 11/20/03 
                 07:48a 
               
               
                   
                 PurgeDrive.h 
                 2,229 
                 11/20/03 
                 07:48a 
               
               
                   
                 PurgeTask.cpp 
                 9,854 
                 11/20/03 
                 07:48a 
               
               
                   
                 PurgeTask.h 
                 1,966 
                 11/20/03 
                 07:48a 
               
               
                   
                 SystemTask.h 
                 636 
                 11/20/03 
                 07:48a 
               
               
                   
                 Task.cpp 
                 2,167 
                 11/20/03 
                 07:48a 
               
               
                   
                 Task.h 
                 1,969 
                 11/20/03 
                 07:48a 
               
               
                   
                 VuWindow.h 
                 2,203 
                 11/20/03 
                 07:48a 
               
               
                   
                 WorkerTask.h 
                 3,350 
                 11/20/03 
                 07:48a 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\T1 Logger Source Code\CVS 
               
             
          
           
               
                   
                 File Name 
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                 Creation Date 
               
               
                   
                   
               
             
          
           
               
                   
                 Entries 
                 83 
                 11/20/03 
                 07:48a 
               
               
                   
                 Repository 
                 37 
                 11/20/03 
                 07:48a 
               
               
                   
                 Root 
                 48 
                 11/20/03 
                 07:48a 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\T1 Logger Source Code\T1LoggerDrv 
               
             
          
           
               
                   
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                 dirs 
                 15 
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                 Code\T1LoggerDrv\FX2\FIFO_TO_IBM_BTH_26 
               
             
          
           
               
                   
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                 Code\T1LoggerDrv\FX2\FIFO_TO_IBM_BTH_46 
               
             
          
           
               
                   
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                 \Digital_Logger\T1 Logger Source 
               
             
          
           
               
                   
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                 Code\T1LoggerDrv\FX2\FIFO_TO_IBM_EP4 
               
             
          
           
               
                   
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                 \Digital_Logger\T1 Logger Source 
               
               
                 Code\T1LoggerDrv\FX2\FIFO_TO_IBM_EP4\CVS 
               
             
          
           
               
                   
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                 \Digital_Logger\T1 Logger Source 
               
               
                 Code\T1LoggerDrv\FX2\FIFO_TO_IBM_EP6 
               
             
          
           
               
                   
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                 \Digital_Logger\T1 Logger Source 
               
               
                 Code\T1LoggerDrv\FX2\FIFO_TO_IBM_EP6\CVS 
               
             
          
           
               
                   
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                 Root 
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                 \Digital_Logger\T1 Logger Source Code\T1LoggerDrv\FX2\T1Logger 
               
             
          
           
               
                   
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                 \Digital_Logger\T1 Logger Source 
               
               
                 Code\T1LoggerDrv\FX2\T1Logger\CVS 
               
             
          
           
               
                   
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                 \Digital_Logger\T1 Logger Source 
               
               
                 Code\T1LoggerDrv\SoundByChannel 
               
             
          
           
               
                   
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                 Creation Date 
               
               
                   
                   
               
             
          
           
               
                   
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                 1,296 
                 11/20/03 
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                 ReadMe.txt 
                 1,244 
                 11/20/03 
                 07:48a 
               
               
                   
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                 2,701 
                 11/20/03 
                 07:48a 
               
               
                   
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                 5,096 
                 11/20/03 
                 07:48a 
               
               
                   
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                 547 
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                 07:48a 
               
               
                   
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                 763 
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                 07:48a 
               
               
                   
                 SoundRecorderConsole.cpp 
                 1,571 
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                 07:48a 
               
               
                   
                 StdAfx.cpp 
                 299 
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                 07:48a 
               
               
                   
                 StdAfx.h 
                 667 
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                 3,728 
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                 07:48a 
               
               
                   
                 USBAdapterOLD.h 
                 1,528 
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                 \Digital_Logger\T1 Logger Source 
               
               
                 Code\T1LoggerDrv\SoundByChannel\CVS 
               
             
          
           
               
                   
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                 648 
                 11/20/03 
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                 Repository 
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                 Root 
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                 \Digital_Logger\T1 Logger Source Code\T1LoggerDrv\SoundRecoder 
               
             
          
           
               
                   
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                 1,296 
                 11/20/03 
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                 ReadMe.txt 
                 1,244 
                 11/20/03 
                 07:48a 
               
               
                   
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                 2,704 
                 11/20/03 
                 07:48a 
               
               
                   
                 SoundRecoder.dsp 
                 5,096 
                 11/20/03 
                 07:48a 
               
               
                   
                 SoundRecoder.dsw 
                 547 
                 11/20/03 
                 07:48a 
               
               
                   
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                 763 
                 11/20/03 
                 07:48a 
               
               
                   
                 SoundRecorderConsole.cpp 
                 1,910 
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                 07:48a 
               
               
                   
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                 299 
                 11/20/03 
                 07:48a 
               
               
                   
                 StdAfx.h 
                 667 
                 11/20/03 
                 07:48a 
               
               
                   
                 USBAdapter.cpp 
                 2,493 
                 11/20/03 
                 07:48a 
               
               
                   
                 USBAdapter.h 
                 1,089 
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                 List of files for directory 
               
               
                 \Digital_Logger\T1 Logger Source 
               
               
                 Code\T1LoggerDrv\SoundRecoder\CVS 
               
             
          
           
               
                   
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                 Size 
                 Creation Date 
               
               
                   
                   
               
             
          
           
               
                   
                 Entries 
                 686 
                 11/20/03 
                 07:48a 
               
               
                   
                 Repository 
                 62 
                 11/20/03 
                 07:48a 
               
               
                   
                 Root 
                 48 
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                 \Digital_Logger\T1 Logger Source Code\T1LoggerDrv\exe 
               
             
          
           
               
                   
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                 CommonDefinitions.h 
                 1,296 
                 11/20/03 
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                 makefile 
                 295 
                 11/20/03 
                 07:48a 
               
               
                   
                 sources 
                 900 
                 11/20/03 
                 07:48a 
               
               
                   
                 Test_T1LoggerDrv.cpp 
                 5,997 
                 11/20/03 
                 07:48a 
               
               
                   
                 Test_T1LoggerDrv.dsp 
                 8,033 
                 11/20/03 
                 07:48a 
               
               
                   
                 USBAdapter.cpp 
                 13,324 
                 11/20/03 
                 07:48a 
               
               
                   
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                 2,829 
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                 \Digital_Logger\T1 Logger Source Code\T1LoggerDrv\exe\CVS 
               
             
          
           
               
                   
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                 Entries 
                 369 
                 11/20/03 
                 07:48a 
               
               
                   
                 Repository 
                 53 
                 11/20/03 
                 07:48a 
               
               
                   
                 Root 
                 48 
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                 List of files for directory 
               
               
                 \Digital_Logger\T1 Logger Source Code\T1LoggerDrv\ezloader 
               
             
          
           
               
                   
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                 Size 
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                 buildchk.log 
                 477 
                 11/20/03 
                 07:48a 
               
               
                   
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                 1,464 
                 11/20/03 
                 07:48a 
               
               
                   
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                 11/20/03 
                 07:48a 
               
               
                   
                 ezloader.c 
                 27,750 
                 11/20/03 
                 07:48a 
               
               
                   
                 ezloader.h 
                 4,590 
                 11/20/03 
                 07:48a 
               
               
                   
                 ezloader.rc 
                 2,430 
                 11/20/03 
                 07:48a 
               
               
                   
                 firmware.c 
                 14,634 
                 11/20/03 
                 07:48a 
               
               
                   
                 loader.c 
                 7,513 
                 11/20/03 
                 07:48a 
               
               
                   
                 Makefile 
                 670 
                 11/20/03 
                 07:48a 
               
               
                   
                 resource.h 
                 412 
                 11/20/03 
                 07:48a 
               
               
                   
                 Sources 
                 1,063 
                 11/20/03 
                 07:48a 
               
               
                   
                 T1LoggerLdr.inf 
                 3,225 
                 11/20/03 
                 07:48a 
               
               
                   
                 T1LoggerLdr.old 
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                 11/20/03 
                 07:48a 
               
               
                   
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 List of files for directory 
               
               
                 \Digital_Logger\T1 Logger Source Code\T1LoggerDrv\ezloader\CVS 
               
             
          
           
               
                   
                 File Name 
                 Size 
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                 Entries 
                 666 
                 11/20/03 
                 07:48a 
               
               
                   
                 Repository 
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                 11/20/03 
                 07:48a 
               
               
                   
                 Root 
                 48 
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                 List of files for directory 
               
               
                 \Digital_Logger\T1 Logger Source Code\T1LoggerDrv\ezloader\lib\CVS 
               
             
          
           
               
                   
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                 240 
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                 414 
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                 137 
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                 20,362 
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                 USB2T1_Const.h 
                 494 
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                 usbid.cpp 
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                 \Digital_Logger\Utilities and Libraries 
               
             
          
           
               
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                 AUHeader.h 
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                 07:26a 
               
               
                 BrowseForFolder.cpp 
                 4,161 
                 05/19/98 
                 09:00p 
               
               
                 BrowseForFolder.h 
                 5,602 
                 05/02/03 
                 01:25p 
               
               
                 CancelException.h 
                 156 
                 04/17/02 
                 07:35a 
               
               
                 ComboInListView.cpp 
                 3,224 
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                 06:01a 
               
               
                 ComboInListView.h 
                 1,611 
                 12/22/98 
                 01:18p 
               
               
                 Copy of Folder.cpp 
                 22,974 
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                 11:47a 
               
               
                 Copy of Folder.h 
                 7,481 
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                 11:35a 
               
               
                 DelayedDirectoryChangeHandler.h 
                 4,948 
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                 04:18p 
               
               
                 DelayedDirectoryChangeHandler.cpp 
                 10,720 
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                 07:46p 
               
               
                 DeletionThread.cpp 
                 6,677 
                 08/06/03 
                 05:20a 
               
               
                 DeletionThread.h 
                 2,553 
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                 07:00p 
               
               
                 DirectoryChanges.cpp 
                 48,153 
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                 10:46a 
               
               
                 DirectoryChanges.h 
                 11,216 
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                 10:19a 
               
               
                 FilterParams.cpp 
                 5,766 
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                 08:34p 
               
               
                 FilterParams.h 
                 2,581 
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                 08:29p 
               
               
                 Folder.cpp 
                 21,302 
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                 09:07p 
               
               
                 Folder.h 
                 5,571 
                 10/15/03 
                 12:27p 
               
               
                 FolderArray.h 
                 617 
                 05/15/02 
                 07:41p 
               
               
                 IMapi.cpp 
                 5,883 
                 02/03/99 
                 02:37p 
               
               
                 IMapi.h 
                 1,217 
                 10/06/98 
                 01:46p 
               
               
                 listeditctrl.cpp 
                 3,413 
                 12/03/02 
                 06:01a 
               
               
                 listeditctrl.h 
                 1,496 
                 12/22/98 
                 01:18p 
               
               
                 ListViewFrame.cpp 
                 4,207 
                 05/15/02 
                 06:53p 
               
               
                 Log.cpp 
                 1,408 
                 01/30/04 
                 10:55a 
               
               
                 Log.h 
                 1,175 
                 01/30/04 
                 07:22a 
               
               
                 MIL2400INIFile.cpp 
                 35,036 
                 07/14/03 
                 08:59a 
               
               
                 MIL2400INIFile.h 
                 3,204 
                 07/14/03 
                 08:59a 
               
               
                 MILAddress.cpp 
                 1,598 
                 09/08/03 
                 01:36a 
               
               
                 MILAddress.h 
                 954 
                 09/08/03 
                 01:36a 
               
               
                 MILDateTime.cpp 
                 821 
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                 10:08a 
               
               
                 MILDateTime.h 
                 1,145 
                 09/08/03 
                 09:01a 
               
               
                 NewHeaderCtrl.cpp 
                 8,471 
                 03/12/02 
                 08:40p 
               
               
                 NewHeaderCtrl.h 
                 3,028 
                 03/12/02 
                 08:40p 
               
               
                 PlayerBuffer.h 
                 6,660 
                 01/08/02 
                 10:18a 
               
               
                 RCa01324 
                 6,958 
                 02/13/03 
                 09:14p 
               
               
                 Readme.txt 
                 1,461 
                 05/02/02 
                 06:30p 
               
               
                 Recording.cpp 
                 88,098 
                 01/31/04 
                 02:46p 
               
               
                 Recording.h 
                 15,041 
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                 08:34a 
               
               
                 Recording.h.bak 
                 11,409 
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                 03:32p 
               
               
                 registry.cpp 
                 16,158 
                 06/09/03 
                 05:34a 
               
               
                 registry.h 
                 2,227 
                 06/09/03 
                 05:34a 
               
               
                 resource.h 
                 780 
                 10/08/03 
                 06:29a 
               
               
                 SampleSpecs.h 
                 547 
                 01/19/99 
                 04:45p 
               
               
                 SBDestination.cpp 
                 1,132 
                 04/25/98 
                 09:22a 
               
               
                 SBDestination.h 
                 910 
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                 StdAfx.cpp 
                 205 
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                 StdAfx.h 
                 873 
                 08/08/03 
                 07:24a 
               
               
                 supergridctrl.cpp 
                 63,319 
                 12/03/02 
                 05:52a 
               
               
                 supergridctrl.h 
                 16,811 
                 12/03/02 
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                 TreeListCtrl.cpp 
                 24,936 
                 08/27/03 
                 07:33a 
               
               
                 UtilFunctions.cpp 
                 73,795 
                 01/28/04 
                 08:23a 
               
               
                 UtilFunctions.h 
                 8,072 
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                 UtilLib.dsp 
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                 249 
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                 5,044 
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                 43 
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                 UtilLib.stt 
                 43 
                 08/05/02 
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                 WaveIn.cpp 
                 15,265 
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                 WaveIn.h 
                 1,921 
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                 WaveOut.cpp 
                 1,411 
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                 WaveOut.h 
                 1,271 
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                 xSkinButton.cpp 
                 25,655 
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                 08:54p 
               
               
                 xSkinButton.h 
                 3,435 
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                 \Digital_Logger\Utilities and Libraries\res 
               
             
          
           
               
                   
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                 UtilLib.rc2 
                 399 
                 02/14/03 
                 09:50a 
               
               
                   
                   
               
             
          
         
       
     
     COPYRIGHT NOTICE 
     A portion of the disclosure of this patent document contains copyrighted material. The copyright owner hereby grants others a right to reproduce copies of the patent document or the patent disclosure exactly as it appears in the files of the United States Patent and Trademark Office, but otherwise reserves all copyright rights whatsoever. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates generally to data recording, and more particularly to systems for recording voice communications as compressed digital data. 
     2. Description of the Prior Art 
     U.S. Pat. No. 6,122,239 (“the &#39;239 patent”) entitled “Pre-Mastering, Archival Optical Recorder That Provides Extended Recording Time” discloses both a pre-mastering, optical recorder and a logging workstation which both receive and condition an analog signal. Both the recorder and the workstation, sometimes referred to as digital loggers, then digitize the conditioned signal storing the digitized data thus obtained in a buffer, preferably either a large RAM or a hard disk. When the digitized data occupies more than a pre-established fraction of the buffer, both the recorder and the workstation further compress the data to recover buffer space thereby permitting recording to continue. The recorder also pre-masters the data for recording onto optical-recording media using an optical-disk recorder included in the digital logger. Instead of an optical-disk recorder, the workstation includes a network interface circuit that interfaces the workstation with a network thereby permitting the logger to transmit digital audio data via the network for recording either to a pre-mastering, optical recorder, or to a digital logger recorder. 
     Presently, a variety of systems exist, analogous to that described in the &#39;239 patent, for concurrently recording several audio signals from various sources including telephone and radio signals. Usually such systems are self-contained and include:
         1. a dedicated microprocessor which operates as a local storage controller; and   2. a Digital Signal Processing (“DSP”) co-processor, usually connected via a Peripheral Component Interface (“PCI”) bus, to the dedicated microprocessor.
 
Systems of this type exhibit decided disadvantages which include complexity, cost, and difficulty in configuration.
       

     BRIEF SUMMARY OF THE INVENTION 
     An object of the present invention is to provide a lower-cost multi-channel digital logger system. 
     Another object of the present invention is to provide a simpler multi-channel digital logger system. 
     Another object of the present invention is to provide a more cost-effective multi-channel digital logger system. 
     Another object of the present invention is to provide a multichannel digital logger system that is simpler to manufacture. 
     Another object of the present invention is to provide a multichannel digital logger system that is easier to configure. 
     Another object of the present invention is to provide a multichannel digital logger system that is economical to manufacture. 
     Another object of the present invention is to provide a digital logger system which includes a linear CODEC for digitizing audio data, the digital audio data being subsequently converted by a software computer program of digital logger system into μLaw compressed digital audio data before recording the compressed digital audio data. 
     Another object of the present invention is to provide a digital logger system that augments information about a recorded telephone call with additional information autonomously retrieved from publicly accessible databases. 
     Briefly, the present invention in one embodiment is a digital logger system adapted for receiving and recording audio telecommunication signals. The digital logger system includes a multichannel interface circuit adapted:
         1. for concurrently and continuously receiving audio telecommunication signals for at least two telephone calls; and   2. for continuously transmitting digital audio data extracted from the received audio telecommunication signals.
 
The digital logger system also includes a Universal Serial Bus (“USB”) hub:
   1. for receiving the digital audio data continuously transmitted from the multichannel interface circuit; and   2. for transmitting the digital audio data to a USB root hub.
 
Lastly, the digital logger system includes a personal computer (“PC”) having a USB root hub that is coupled to the USB hub. The PC receives the digital audio data transmitted from the USB hub, and executes PC software. The PC software continuously monitors the received digital audio data for decoding line status and signaling information embedded in digital audio data to determine status of a telephone line including a telephone line “going off hook.” Upon detecting a telephone line “going off hook,” the PC software records both:
   1. an audio header that stores information about a telephone call; and   2. an audio file that stores compressed digital audio data for the telephone call.       

     In another embodiment the present invention is an improved digital logger system adapted for receiving and recording audio telecommunication signals. The digital logger system including a PC which executes PC software that:
         1. monitors digital audio data of audio telecommunication signals for line status and signaling information embedded in digital audio data to determine status of a telephone line including a telephone line “going off hook;” and   2. upon detecting a telephone line “going off hook,” records both:
           a. an audio header that stores information about a telephone call; and   b. an audio file that stores compressed digital audio data for the telephone call.
 
This embodiment of the present invention also includes a search engine which, upon decoding appropriate signaling information for a telephone call, initiates a real-time reverse-lookup that accesses publicly accessible directories and business information.
   
               

     These and other features, objects and advantages will be understood or apparent to those of ordinary skill in the art from the following detailed description of the preferred embodiment as illustrated in the various drawing figures. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective diagram illustrating a digital logger system of the present invention that includes a PC and an eight (8) channel signal processor in accordance with a preferred embodiment of the present invention, and that also usually includes both a display and a keyboard; 
         FIG. 2  is a mixed schematic and block diagram for the eight (8) channel multichannel interface circuit, included in the signal processor depicted in  FIG. 1 , that receives analog audio communication signals from telephone trunk lines and generates digital audio data for transmission to the PC; 
         FIG. 3  is a flow diagram depicting processing performed on digital audio data received from the eight (8) channel signal processor by software executed by the PC; 
         FIG. 4  is an alternative embodiment of the flow diagram of  FIG. 3  which further includes a search engine that autonomously searches Internet Web sites in real-time for information pertinent to audio data then being processed within the PC; and 
         FIG. 5  is a mixed schematic and block diagram for an alternative embodiment of the multichannel interface circuit depicted in  FIG. 2  that receives audio communication signals from a digital hybrid telephone T1 line and generates digital audio data for transmission to the PC. 
     
    
    
     DETAILED DESCRIPTION 
     The perspective diagram of  FIG. 1  depicts a digital logger system in accordance with the present invention referred to by the general reference character  10 . The digital logger system  10  includes a PC  12  having a USB root hub, not depicted in any of the FIGS, to which a USB cable  14  connects an eight (8) channel signal processor  16 . In most instances, the digital logger system  10  also includes both a display  22  connected to the PC  12  by a display cable  24 , and a keyboard  26  connected to the PC  12  by a keyboard cable  28 . Although the USB cable  14  may supply electrical power for energizing the operation of some devices connected to the PC  12  thereby, a preferred embodiment of the signal processor  16  also includes an external 5 volt power supply that is not illustrated in any of the FIGS. Other items not illustrated in  FIG. 1  which may also be included in the digital logger system  10  are a mouse, track ball or joy stick, and also audio speakers for listening to communications recorded by the digital logger system  10 . 
     In a presently preferred embodiment, the signal processor  16  includes eight (8) outside-analog-trunk receptacles  32 . The outside-analog-trunk receptacles  32  are adapted to receive plugs of individual telephone cables that connect the signal processor  16  to analog telephone trunk lines. This embodiment of the signal processor  16  also includes eight (8) telephone receptacles  36 . The telephone receptacles  36  are adapted to receive plugs of individual telephone cables that connect the signal processor  16  either to a handset, to a PBX, or to a telephone. For this particular embodiment of the signal processor  16 , the outside-analog-trunk receptacles  32  and the telephone receptacles  36  are adapted to receive a type RJ12 plug. 
     As illustrated in  FIG. 2 , within the signal processor  16  each of the outside-analog-trunk receptacles  32  connects to one of the telephone receptacles  36 . In this way the signal processor  16  couples analog audio communication signals between each telephone trunk line, i.e. through one outside-analog-trunk receptacle  32  and the telephone receptacle  36  connected thereto, and a handset, a PBX, or a telephone. 
     The signal processor  16  includes four (4) identical multichannel interface circuits  42 , each of which is respectively enclosed within a dashed line in the illustration of  FIG. 2 . Each multichannel interface circuit  42  equips the signal processor  16  with a pair of simple line interfaces. Each line interface respectively receives and electronically conditions an analog audio communication signal from one of the outside-analog-trunk receptacles  32 . Each line interface includes a series connected capacitor  44  and first winding of a transformer  46  that are connected in series across the outside-analog-trunk receptacle  32 . A second winding of the transformer  46  connects to a surge protection circuit which includes a capacitor  52  that connects across the second winding to circuit ground in parallel with two oppositely oriented, series connected, pairs of 1N4007 diodes  54 . The capacitively coupled transformer  46  and the surge protection circuit provides AC line coupling which is compatible with both “wet” and “dry” telephone trunk lines. This configuration for the transformer  46  and the surge protection circuit allows each multichannel interface circuit  42  to continuously and passively monitor a pair of telephone trunk lines without “going off hook,” i.e. without presenting low impedance to either telephone trunk line connected respectively to the outside-analog-trunk receptacles  32 . 
     Furthermore, the transformer  46  and capacitor  44  provide bi-directional coupling which enables the multichannel interface circuit  42  to independently inject audio signals back into each of the telephone trunk lines without “going off hook.” The ability to inject an audio signal back into a trunk line permits automatically presenting a caller with audible announcements such as “this call may be monitored or recorded for quality assurance.” 
     Those skilled in the art will appreciate that an audio signal may also be received from each outside-analog-trunk receptacle  32  into the multichannel interface circuit  42  using a high-impedance operational amplifier instead of the transformer  46 . However, use of a high-impedance operational amplifier provides only unidirectional coupling of an analog signal from a telephone trunk line, and therefore prevents injecting an audio signal back into the line as described above. 
     In addition to the surge protection circuit, each channel of the multichannel interface circuit  42  includes a series connected capacitor  56  and potentiometer  58  also connected across the second winding of the transformer  46 . A series connected resistor  62  and capacitor  64  couple an analog signal from an adjustable center terminal of the potentiometer  58  to an inverting input terminal of an amplifier  66 . The amplifier  66  is preferably a model MC34072 manufactured by Motorola, Inc. or by Unisonic Technologies Co., Ltd. A gain control feedback resistor  68  also connects between the inverting input terminal of the amplifier  66  and an output terminal of the amplifier  66 . The strength of the analog audio signal supplied from each potentiometer  58  to the amplifier  66  may be adjusted by rotating a control knob  69 , depicted in  FIG. 1 , that is coupled to the potentiometer  58 . A label  71 , adjacent to each control knob  69 , identifies the channel for which the control knob  69  adjusts the analog audio signal&#39;s strength. 
     A non-inverting input terminal of each amplifier  66  is coupled through a capacitor  72  to circuit ground, and connects directly to a VCCM terminal  73  of a model PCM2904DB “Stereo Analog CODEC With USB Interface”  74  that is manufactured by Texas Instruments Incorporated. The preferred embodiment of the signal processor  16  uses this lower-cost, linear Pulse Code Modulation (“PCM”) model PCM2904DB stereo CODEC  74  instead of a more expensive logarithmic telecom CODEC such as that disclosed in the &#39;239 patent. Use of such a commercial, off-the-shelf CODEC significantly betters the cost-effectiveness of the signal processor  16  in comparison with a digital logger of the type disclosed in the &#39;239 patent. An output terminal  76  of the pair of amplifiers  66  in each multichannel interface circuit  42  connects respectively either to an ADC analog input for a R-channel V IN R terminal  78 R or a L-channel V IN L terminal  78 L of the stereo CODEC  74 . As illustrated in  FIG. 2 , the single stereo CODEC  74  included in each multichannel interface circuit  42  simultaneously converts two monaural channels of audio communication signals respectively received through each of the outside-analog-trunk receptacles  32  into digital audio data while preserving adequate separation in that data between the two analog signals. 
     The stereo CODEC  74  transmits from its USB differential input/output minus terminal  82   m  and its USB differential plus terminal  82   p  audio data digitized from the two channels of audio signals received by the outside-analog-trunk receptacles  32  included in each multichannel interface circuit  42 . The pair of differential signals transmitted from the input/output terminals  82   m  and  82   p  of the stereo CODEC  74  included in each four (4) multichannel interface circuit  42  are respectively supplied to pairs of USB upstream differential minus and plus data terminals  86   m  and  86   p  of a TUSB2046BFV 4-port USB hub  88  that is manufactured by Texas Instruments Incorporated. Root port USB downstream differential minus and plus data terminals  92   m  and  92   p  of the USB hub  88  are coupled to the USB cable  14  via a USB “B” receptacle  94 . Also connected to the USB hub  88  is a USB configuration data EEPROM  98  which stores a vendor ID (“VID”) and a product ID (“PID”) for the signal processor  16 . Use of the USB hub  88  is vital to the digital logger system  10  because it establishes within the digital logger system  10  a USB “Composite Device” that reduces the cost of the digital logger system  10 , and allows all four (4) multichannel interface circuits  42  together with the USB hub  88  to be assembled on a single printed circuit board (PCB) using proper mixed-signal design rules. 
     As depicted in  FIG. 2 , analog outputs for right channel  102 R and for left channel  102 L of the stereo CODEC  74  of each multichannel interface circuit  42  are respectively coupled by a series connected resistor  104  and capacitor  106  to the second windings of each transformer  46  thereof. Digital audio data appropriately supplied to the stereo CODEC  74  via the USB hub  88  produces an analog output signal that is coupled through the transformer  46  to the outside-analog-trunk receptacle  32  thereby permitting the signal processor  16  to transmit audible announcements to callers. 
     Texas Instruments model PCM2904DB stereo CODECs  74  are preferred for the multichannel interface circuit  42  because they comply with the “Human Interface Driver” (“HID”) specification. For computers running either LINUX or particular Microsoft operating systems such as Windows 98 and 2000, the HID standard specifies a software interface which permits an application computer program running in the PC  12  to communicate with the signal processor  16  via the USB cable  14 . Consequently, a combination of the preferred stereo CODECs  74 , the USB hub  88 , the USB cable  14  and an operating system running in the PC  12  which provides HID functionality avoids both any need to write a device driver specifically for the signal processor  16 , and the installation of special device driver software in the PC  12  of every digital logger system  10 . Instead, application software exchanges data between the digital logger system  10  and the signal processor  16  using the operating system&#39;s native HID  112  illustrated in  FIG. 3 . 
     In general, HID-class devices include those controlled by humans for operating a computer system. Typical examples of HID-class devices that can communicate with a PC via a USB in conjunction with the HID  112  include keyboards, mice, trackballs, joysticks, disk drives, printers, and scanners. The HID  112  is general, and primarily handles the USB functionality of the device and generic HID functionality. The HID-class specification is the product of a working group sponsored by the USB Implementers Forum (www.usb.org). 
     When a device is plugged into the USB or when a host PC is turned on with a device attached to the USB, an operating system that includes a HID  112  running in the PC retrieves a series of descriptors from each USB device during a process called enumeration. After enumeration, the HID  112  provides an interrupt pipe for the device to send data packets, and the HID  112  opens the pipe to the interrupt endpoint and starts polling. The HID  112  is also responsible for managing the device through the default control pipe. HID devices dynamically describe their packets and other parameters through a HID report descriptor. The HID parser is a miscellaneous module that parses the HID report descriptor and creates a database of information about the device. 
     Major features and limitations of a HID  112  are:
         1. a full-speed HID  112  can transfer up to 64,000 bytes per second (64 bytes in each 1 ms frame);   2. a HID  112  can request that the PC poll the device periodically to find out if the device has data to send; and   3. all data exchanged by a HID  112  resides in defined data structures called reports.
 
A single report can contain up to 65,535 bytes. The device&#39;s firmware must include a report descriptor that describes the data being exchanged. The report format for a HID  112  is flexible enough to handle almost any type of data.
       

     Due to its generality, a HID  112  may also be used in conjunction with the USB for communicating with devices such as the signal processor  16 , that do not really involve a human interface, but which exhibit communication requirements similar to those of human interface devices. The HID  112  handles any such device (actually the interface with such a device) that claims to comply with the HID specification. 
     Description of Software 
     A computer program executed by the PC  12  is also vital to the digital logger system  10 . Ever increasing computational capabilities of PCs presently enables a single PC to receive multiple channels of digital audio data via its USB while software running on the PC concurrently:
         1. decodes communication signals embedded in digital audio data received from the signal processor  16 ;   2. compresses the digital audio data; and   3. stores the compressed digital audio data onto a recording device such as a hard disk.       

     Appendix I provides a source code program listing for computer programs included in an implementation of the present invention. The computer program is written in the C++ programming language that is well-known to those skilled in the art. The program has been executed on a Dell P4 PC. It is readily apparent to those skilled in the art that various other programming languages and/or digital computers could be used for alternative, equivalent implementations of the invention. 
     For Microsoft&#39;s Windows operating systems, a low-level software interface connects to audio primitives of the HID  112 . For the LINUX operating system, the low-level interface ports to the HID  112  through a block-and-character driver. Packets of digital audio data for each of the eight channels received from the signal processor  16  are stored in local system memory and passed to the higher level portions of the application program using individual ring buffers included in audio data buffers  114 . The ring buffers of the audio data buffers  114  cache the audio data stream during periods in which the operating system is occupied with higher priority tasks, and therefore is unable to allocate adequate resources to process digital audio data in real-time. 
     A signaling detector  115  also receives packets of digital audio data for each of the eight channels of digital audio data received from the signal processor  16 . Whenever in checking packets of digital audio data the signaling detector  115  determines that a signaling event is occurring, it transmits a control signal to a fast fourier transform (“FFT”) routine  116  which activates the FFT routine  116  for processing packets of digital audio data. 
     Whenever processing resources of the PC  12  become available, the FFT routine  116  performs a Discrete Fourier Transform (“DFT”) on packets of incoming audio digital audio data both individually and in small groups. The FFT routine  116  passes the spectrum versus time matrix which it produces to a spectral averager  118 . 
     For each channel of digital audio data received from the signal processor  16 , the spectral averager  118  accumulates spectral data received from the FFT routine  116  to detect spectral peaks which exceed preset threshold values. The spectral values are stored in tables and vary significantly depending on the period of the incoming signaling. When peaks in the spectral data exceed threshold values corresponding to an anticipated spectral distribution of incoming signaling, the spectral averager  118  increments a counter which accumulates data for the channel on which the peak occurred. Periodically, these counters are decremented or zeroed. Detection of a signaling event occurs, e.g. “going off hook,” dial tone, ringing, a particular touch-tone key is being pressed, etc., when values in counters exceed specified thresholds. 
     As described previously, the signal processor  16  supplies digital audio data continuously for each of its eight (8) channels even when no telephone call is occurring. To record digital audio data only during a telephone call, a telco tone decode routine  124  processes output from the spectral averager  118  to detect and decode various different types telephone signaling such as ringing, Dual-Tone Multifrequency (“DTMF”) signaling, Automatic Number Identification (“ANI”) also known as Caller-ID (“CID”), or Automatic Location Identification (“ALI”). The decode routine  124  also includes a deserializer, which operates analogous to a hardware shift-register, for converting a serialized stream of decoded telephone signals into parallel bytes for further processing by an application program  126 . In addition, the deserializer also performs parity detection and correction when ANI/CID or ALI signaling occurs. 
     The application program  126  includes an audio header composer which receives telephone signaling data decoded by the decode routine  124 . Information about each telephone call is stored in an audio header portion  132  at the beginning of an audio file  134 . Data stored in the audio header portion  132  include the channel of the signal processor  16  from which the data was recorded; the date, time and time zone of the recording; the name assigned to the PC  12 ; the model and serial numbers of the signal processor  16  and the type of stereo CODEC  74  included in the signal processor  16 ; whether data in the audio file  134  has been analyzed for DTMF or CID signaling; the direction of the telephone call either incoming or outgoing; and the telephone number specified by DTMF or CID signaling. The audio header portion  132  makes each recorded telephone call a self-contained repository both for the recorded digital audio data, and for the information about the calling party which was obtained while recording the digital audio data. 
     The application program  126  also stores digital audio data for each recorded telephone call, compressed as described in the &#39;239 patent, into an audio data portion  136  of a separate, time-stamped audio file  134 . Pointers to various locations within each ring buffer in the audio data buffers  114  ensure temporal synchronization between the arrival at the application program  126  of parallel bytes of decoded telephone signals extracted from the digital audio data of a particular channel by the decode routine  124  and compression of that channel&#39;s digital audio data by the application program  126 . However, since the a model PCM2904DB stereo CODEC  74  produces linear PCM digital audio data rather than μLaw compressed digital audio data such as that produced by more expensive telecom CODECs, before performing software compression using table lookup the application program  126  of the present invention first converts the linear PCM digital audio data into μLaw compressed digital audio data. The &#39;239 patent is hereby incorporated by reference as though fully set forth here. 
     When a telephone line initially “goes off hook,” the application program  126  allocates a “temporary” header array in RAM which stores as much information as is initially available when the call commences. This header array contains sufficient information that an audio playback program can reproduce compressed digital audio data even though the telephone call is incomplete. Thereafter, the application program  126  opens the audio file  134  for recording both the audio header portion  132  and the audio data portion  136 . In opening the audio file  134 , the application program  126  stores the “temporary” header at the beginning of the audio file  134 . A pointer at the beginning of the audio header portion  132  specifies where the audio data portion  136  begins in the audio file  134 . Thereafter, as the application program  126  prepares compressed digital audio data it is written into the audio data portion  136  of the audio file  134 . Writing the compressed digital audio data into the audio data portion  136  immediately permits reproducing the telephone call in “real time” while it is being logged. While compressed digital audio data is being recorded into the audio data portion  136 , gradually over time the application program  126  updates the audio header portion  132  with the DTMF data, CID and other information. After the call is completed, the application program  126  stores the last of the information, e.g. call length, etc., into the audio header portion  132 . Thus at the end of each telephone call, the single audio file  134  contains a complete audio header portion  132  and all the compressed digital audio data in the audio data portion  136  for a single telephone call. 
     When appropriate for transmitting an audible announcement to a caller, the application program  126  also transmits digital audio data to announcement buffers  138  for transmission via the HID  112  to the appropriate stereo CODEC  74  in the signal processor  16 . For example, following ring detection and a telephone line “going off hook,” the application program  126  might transmit digital audio data to the announcement buffers  138  which, via a specified channel of the signal processor  16 , presents the caller with an audible announcement such as “this call may be monitored or recorded for quality assurance.” 
     An alternative embodiment of the present invention illustrated in  FIG. 4  augments the application program  126  with a search engine  142 . When DTMF, CID or ALI signals occur, the application program  126  passes that data to the search engine  142  which initiates, via the Internet  144 , a real-time reverse-lookup. Using the street address or caller&#39;s telephone number, the search engine  142  issues Internet Hypertext Transfer Protocol (“HTTP”) requests to search publicly accessible Internet directories for business data. If the search engine  142  receives a CID telephone number, the address and name of the calling party may be determined via a reverse-lookup of the number in published directories. In addition, the telephone number is matched against search-engine responses, and these responses are traced to generate business information, such as the Standard Industrial Codes (“SIC”) and other general information about the caller. The search engine  142  then passes the information obtained from these searches to the audio header composer of the application program  126  for storage in the audio header portion  132 . 
     A higher level user-interface, not illustrated in any of the FIGS., may then allow the user to quickly index audio files  134  based on information stored in audio header portions  132 . This information is searchable and reports can be generated using information stored about selected calls. For example, it becomes easy to generate a list of calls which have originated from IBM Corporation, since the main IBM telephone number appears in the CID stream, and the search engine  142  uses that number to reverse-index an address. Another example is the ability to locate calls originating from a particular street address, if that address is accessible via the Internet  144  along with the related telephone number. It is readily apparent that the usefulness of the search engine  142  in obtaining information from callers which have blocked CID is limited, but a significant amount of business information may be accessed via the Internet  144  for businesses which do not have publicly listed telephone numbers. This information can then be used to index and sort audio files  134  which might otherwise be of limited use. 
     If information obtained by the search engine  142  is to be provided in real-time to someone who is answering a telephone call, then in addition to storage in the audio header portion  132 , the information must be communicated via a network to a workstation that is visible to the person answering the telephone call. 
     While the accuracy currently available with speech-to-text software is limited, eventually it should be possible to generate audio file headers which contain a text which accurately presents the spoken words in audio files  134 . This capability has been demonstrated using the publicly available SPHYNX software. Presently, the accuracy of the speech-to-text is limited by the available processing power of the PC  12 . As processing power of PCs  12  increase, it is apparent that accuracy will increase and true “speaker independent” voice recognition with larger vocabularies will become practical. 
     Although the present invention has been described in terms of the presently preferred embodiment, it is to be understood that such disclosure is purely illustrative and is not to be interpreted as limiting. For example, if audio communication signals are supplied to the signal processor  16  via a T1 line, then as illustrated in  FIG. 5  preferably a Dallas Semiconductor DS3152 Framer  162  coupled to a Cypress Semiconductor E Z-USB FX2™ USB Microcontroller High-speed Peripheral Controller  164  by a bus  166  replace the stereo CODECs  74  and their associated components. Those elements of the alternative embodiment of the present invention depicted in  FIG. 5  that are common to the multichannel interface circuit  42  illustrated in  FIG. 2  carry the same reference numeral distinguished by a prime (“ ′ ”) designation. For such a configuration of the multichannel interface circuit  42 ′, the Framer  162  rather than the stereo CODEC  74  interfaces the T1 telephone line at the physical layer to thereby receive the audio communication signal directly from the transformer  46 . The Peripheral Controller  164  exchanges digital audio data with the Framer  162  and provides a HID compatible interface between the Framer  162  and the USB hub  88 ′. Note that because the digital audio data received from the T1 telephone line by the Framer  162  has already undergone μLaw compression, when the multichannel interface circuit  42 ′ connects to a T1 telephone line the application program  126 ′ does not perform μLaw compression. Note also that the accuracy of speech-to-text conversion can be improved if the signal processor  16  is connected to a true-digital hybrid telephone line such as a T1 line. 
     Consequently, without departing from the spirit and scope of the invention, various alterations, modifications, and/or alternative applications of the invention will, no doubt, be suggested to those skilled in the art after having read the preceding disclosure. Accordingly, it is intended that the following claims be interpreted as encompassing all alterations, modifications, or alternative applications as fall within the true spirit and scope of the invention.