Method for the detection of impedances and for the...
Method of detecting remote ground condition
Method of detecting remote ground condition
Method of determining the physical length of a telephone line
Methods for detecting defective communications lines
Metrics-related testing of an operational support system...
Multiline transmission line test receptacle with provision for t
Network interface device with disconnectable half-ringer
Nonintrusive speech level and dynamic noise measurements
Open power loop detector for transmission line elements
Priority auto-control method of signal routes in No. 7...
PSTN VOIP reconciliation
Public modular-telephone management system
Remote test telephone line access system
Remote testing of a trunk leading to an automatic call distribut
Remotely operable telecommunications conductor test circuit...
Simultaneous tracing of multiple phone/data cables
State monitoring method and apparatus in subscriber line test
Subscriber line monitoring circuit
Subscriber line validation of a telephone network