Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
Patent
1993-08-17
1996-12-10
Zele, Krista M.
Telephonic communications
Plural exchange network or interconnection
With interexchange network routing
379221, H04M 336, H04Q 354
Patent
active
055839282
ABSTRACT:
Failure of a local exchange in a communications network (such as the PSTN) is detected by monitoring a combination of parameters. Each parameter in the combination is monitored for meeting predetermined criteria. In particular, a local exchange failure is recognized when the average value of the All Circuits Engaged (ACE) parameters over all traffic routes into a local exchange rises in a significant manner and the average value of the Circuits in Service (CCTS IS) parameters over all traffic routes into that exchange decreases in a significant manner.
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EPO Search Reports.
Fisk Donald
Swaine Charles A.
Tester Brian C.
British Telecommunications public limited company
Presson Thomas F.
Zele Krista M.
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