Abstract:
A system which allows modular expansion to provide additional services to high speed data. A high speed data line such as DSL or cable is input to a broadband expandable modem device. The modem device produces an output indicative of the data within the data stream. An expansion output is indicative of voice within the data stream which is separated from the data. The expansion output is coupled to one of a plurality of voice adapters. Each of the voice adapters is expandable so daisy chain communication is possible to add additional layers of voice by simply acquiring additional voice adapters. The system preferably uses USB for the expansion capability.

Description:
BACKGROUND  
         [0001]    The present application describes broadband access and uses for a high bandwidth line.  
           [0002]    Modern internet access allows increased bandwidth capability. For example, cable modems, Digital Subscriber Line (“DSL”) and other similar “broadband” internet services provide more bandwidth than is needed during an average user&#39;s web browsing.  
           [0003]    The extra bandwidth can be used for other purposes. For example, various systems including voice-over-DSL and voice-over-cable allow a user to encode their voice on the same system that carries the data.  
         SUMMARY  
         [0004]    The present application describes an integrated access device which is modular, expandable, and allows connection of multiple services over the broadband data connection.  
           [0005]    The present application describes a modular communication system, that has a first communication device, having a first port which allows receiving broadband data, an expansion port which provides output data to allow adding additional data-receiving elements thereto, and a first electronic element which analyzes the broadband data and separates data information from voice information therein and couples the voice information to the expansion port. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0006]    These and other aspects will now be described in detail with respect to the accompanying drawings, wherein:  
         [0007]    [0007]FIG. 1 shows a basic block diagram of the overall system; and  
         [0008]    [0008]FIG. 2 shows a block diagram of the voice adapter portion. 
     
    
     DETAILED DESCRIPTION  
       [0009]    The present disclosure defines a number of modular and expandable devices,  100 ,  120 ,  130 . Each device is formed within a housing, and each device includes an expansion port. Each of the expansion ports includes a signal that carries the excess information, i.e., any information that is not processed and/or used by the electronics within the housing. The expansion port includes a connection, and the information on the connection allows connecting to an additional modular and expandable device.  
         [0010]    The primary device is the basic modem device  100 . This device is contained within housing  105 , which can be a stand alone housing cabinet, a circuit card, or even the packaging for a chip such as an application specific integrated circuit or ASIC. The perimeter of housing  105  a data port  102  which is connected to a high bandwidth information stream such as a broadband data source  99 , e.g. a DSL line, cable or the like, and an expansion port  116 .  
         [0011]    The data from the broadband source  99  is coupled to a broadband interface  104 . This can be a commercially available modem chip or a digital signal processor (DSP) configured for broadband access.  
         [0012]    The broadband interface feeds a first electronic element  100 , which can include a processor or a microcontroller. The controller analyzes the information output  101  from the broadband interface  104 . This information output  101  may include both data portions  112  as well as embedded voice streams  113 . The data  112  is separated from the embedded voice streams  113 . Only the data portion  112  is used by the modem unit  100 , so all other portions, including the voice streams  113  is routed to the expansion port  116 . A Universal Serial Bus (USB) host  114  formats the information and makes it available at expansion port  116 . This information is intended to be coupled to Telephony adapters as described herein. Cost effective expansion therefore becomes quite practical.  
         [0013]    An optional hardware assister  108  can be a digital signal processor, a floating point unit, or another device which can increase throughput of information. A buffer element  107  can also be provided, for temporary storage as needed.  
         [0014]    As described above, the system controller  106  acts on the information stream from the broadband data line  99  to separate the information stream into a data output  112  and voice streams part  113 . The data output  112  is formatted into a specified protocol, e.g. Ethernet 7M and output as formatted output data  112 . The Ethernet data can be used over a local area network providing Internet access, for example.  
         [0015]    Data output  112  can alternately be in another standard network form such as universal serial bus (USB) or the like.  
         [0016]    The voice part  113  from system controller  106  is coupled to a USB adapter  114  which drives a USB output via expansion port  116 . Expansion port  116  can be used to communicate with one or more additional modular devices.  
         [0017]    The system block diagram of FIG. 1 shows first and second separate voice adapter devices  120  and  130 , respectively. Each voice adaptor device can connect to a plurality of different telephone handsets, e.g.  122 . Each voice adapter such as  120 , includes an input expansion jack  124  that receives the input representing the information that was not used and output by modem  100 . An output expansion jack  126  is used to pass information that is not used by the adapter  120 . This excess information  129  can be sent to an output port for another expansion unit.  
         [0018]    At least one RJ11 jack  128  can be provided on expansion unit  120  for connection to a telephone and/or additional telephone electronics. Alternately, the connection to the telephone handsets can use some other connector form, or a wireless connection such as by Bluetooth™, using the Bluetooth 1.0 specification, Jul. 26, 1999.  
         [0019]    A detailed block diagram of the voice adapter  120  is shown in FIG. 2. An expansion line  117  from the broadband modem  100 , including the information  116 , is input to USB device controller  200 . The information input could also be from an upstream voice adapter.  
         [0020]    The USB device controller  200  has an associated memory device  205  such as a static RAM or flash memory which includes operating information for USB device controller  200 , as well as the ability to update USB parameters/protocol via downloading to a flash memory. USB device controller  200  also includes a hub portion  210  which controls communication with other USB expansion devices over the expansion slot  126 . The information in memory device  205 , for example, can include a list of telephone numbers that are to be serviced by the specific voice adapter. Device controller  200  then separates the information associated with those specific telephone numbers as its data output  220 . All remaining information is possibly reformatted, and output on the expansion port  126 .  
         [0021]    The data output  220  from the USB device controller is coupled to an information separator a pulse code modulated (PCM) transcoder  230  (or similar voice codec) for compression/decinoression, e.g. for bandwidth reduction. The system should retain compatibility, however, with standard 64K bit (PCM) data, to enable use of an analog modem connected to one of the voice adapter ports.  
         [0022]    ADPCM transcoder  230  compresses/uncompresses and separates the information as  240 . Each of the separated data streams from  240  is coupled to a respective PCM codec  250 , and subscriber line interface circuit Subscriber Line Interface Card (SLIC)  260 . The SLIC provides standard “tip” and “ring” signals  262  which can be in any standard form. One form is an RJ11 jack. Another is a wireless transmission, e.g. over a part  15  frequency to a cordless phone receiver or via Bluetooth as described above.  
         [0023]    According to the paradigm of this system, a service provider can provide a user with one of the modular devices, e.g. the broadband modem  100 . The user can later be offered the opportunity to add additional telephone lines, each with a separate telephone number, without additional wiring. The additional numbers are obtained by programming the number into the memory device  205 . The modem unit  100  recognizes the data information and separates it from the voice information that it does not process. The voice information is coupled to expansion port  116 . Each voice adapter recognizes the telephone numbers associated with that voice adapter. Additional telephone lines are added by simply programming the new number into the memory device  205 , if a port is available. If not, an additional voice adapter is connected to the expansion connector  126 .  
         [0024]    The service provider defines the additional telephone numbers. Any incoming voice call is multiplexed on the broadband data source  99 , along with a code indication of the phone number. Each adapter recognizes its own numbers, and passes other numbers. Downstream adapters, added later on, recognize the additional numbers. No change needs to be made to the upstream adapters for these additional numbers, since each adapter passes any information that it is not programmed to accept.  
         [0025]    The user can later add additional modems or other devices, as well as any desired number of voice adapters for any desired number of lines. The number of phones or services is limited only by bandwidth which may be limited by the slot that is broadband data source  99 .  
         [0026]    Other embodiments are with the disclosed embodiment. For example, while this describes the modular devices as being in separate housings, they can alternately be separate expansion cards in a backplane, or separate units that can be plugged in to a basic motherboard. For modularity, it is convenient if some portion of the units are separate. In addition, other expansion technologies, such as firewire and the like, can be used in place of USB.