Patent ID: 6744853
Filing Date: 2004-06-01
Classification: H04M,H04Q

Abstract:
A telephone line testing device for use with a PABX having a plurality of input lines connected to a plurality of telephone lines of a telephone system, each of said input lines of the PABX being associated with one of said telephone lines, said telephone line testing device including:(a) test circuitry having (i) a signal generator for generating a test signal; (ii) a ringing signal detector for detecting the presence of a ringing signal on said telephone lines; and (iii) a second switch means which is responsive to the ringing signal detector for automatically supplying a test signal generated by the signal generator when a ringing signal is detected on one of said telephone lines; (b) a first connecting means for connection to said telephone lines of the telephone system; (c) a second connecting means for connection to said input lines of the PABX; and (d) a first switch means for connecting a selected one of said telephone lines either to said input line of the PABX associated with said selected one of said telephone lines or the test circuitry.