Network interconnect backup

Details Network interconnect backup Network interconnect backup

1994-11-03

1997-01-07

Olms, Douglas W.

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

370384, H04J 116

Patent

active

055924662

ABSTRACT:
A system and method for backing up CCS7 call control messages between an IXC network and an LEC network in the event of failures in the CNI-based signaling system of the IXC toll switches. The architecture provides network paths for the LEC's CCS7 call control messages to reach the IXC toll switches with CCS7 signaling isolation, and for control messages from the CCS7-isolated toll switches to reach the LEC's switching offices. Messages from the LEC are routed from an IXC Signal Transfer Point to a Gateway switch. The Gateway switch routes the messages to the isolated victim switch via helper switches using 56 kbps F-links to the victim switch.

REFERENCES:
patent: 5278823 (1994-01-01), Handel
patent: 5317562 (1994-05-01), Nardin et al.

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