Network traffic protection system

Details Network traffic protection system Network traffic protection system

1994-10-17

1998-05-26

Nguyen, Chau

Multiplex communications

Diagnostic testing

Fault detection

370249, 370224, H04L 122, H04J 314

Patent

active

057577749

ABSTRACT:
A failure detector, connected to receive a signal from an interface at a lower level than the SONET level, detects a failure in that interface, such as a fiber cut or the loss of signals. An AIS generator is responsive to the detection of a failure by the failure detector to generate an AIS at the SONET level (STS and VT levels). A signal processing circuit converts a low-level signal from the interface to an SONET-level signal. When receiving the SONET-level AIS from the AIS generator, the signal processing circuit inserts it onto the SONET-level signal for application to SONET ADMs.

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