Device for monitoring a switch

Details Device for monitoring a switch Device for monitoring a switch

1994-04-29

1996-11-26

Chin, Wellington

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Of centralized switching system

379 9, 379 10, 379 16, 379 17, 379 32, 379 33, 379 34, H04M 308, H04M 322

Patent

active

055793681

ABSTRACT:
A switch sentry device (22) having a digital telephony switch (SCX, 16), a device (24) for processing information, a device (24, 34) for simulating a call from the processing device (24) to the switch (SCX, 16), a device (SCX, 16) responsive to the call simulating device (24, 34) for simulating a primary ringing line (36) from the switch (SCX, 16) to the processing device (24), a device (SCX, 16) responsive to the call simulating device (24, 34) for simulation an alternate ringing line (38) from the switch (SCX, 16) to the processing device (24), and a device (24) for determining an inoperative condition of the switch (SCX, 16).

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