H - Electricity – 04 – M
Patent
H - Electricity
04
M
344/1, 344/29
H04M 3/28 (2006.01) H04M 7/14 (2006.01)
Patent
CA 1181158
Abstract A telephony network with a digital central office and one or more remotely located digital satellite units. Each digital satellite unit connects to a number of remote subscriber lines and monitors these lines to establish communications through interconnecting spans and a digital satellite interface at the digital central office. The digital satellite interface also connects to port group highways in the digital central switch, to call processors in the digital central switch, and to a maintenance processor in the digital central switch. An automatic test circuit communicates with the interface, and each remote digital satellite unit contains complementary testing circuitry. A test call is made to test the system by activating a test access relay at the remote digital satellite unit and producing a call to the automatic test circuit. The automatic test circuit then generates a tone that is carried as voice data to the remote digital satellite unit test circuit. If this tone is received, the test circuit at the digital satellite unit sends a tone followed by dial pulses. If the automatic test circuit receives the tone and dial pulses within specifications, the automatic testing has passed and no further action occurs. If it fails, a message is sent back to the digital satellite interface, so various levels of diagnostics utilizing the automatic test call circuit can be performed to isolate the cause of the failure.
385730
Kandell Ronald J.
Merriam Donald R.
Root Bernard H.
Woodruff William W.
Smart & Biggar
Stromberg-Carlson Corporation
LandOfFree
Telephony system with automatic test call generator for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Telephony system with automatic test call generator for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephony system with automatic test call generator for... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1222629