Network traffic protection system
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United States of America Patent
Stats
-
May 26, 1998
Grant Date -
N/A
app pub date -
Oct 17, 1994
filing date -
Mar 18, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
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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