Multiplex communications – Wide area network – Packet switching
Patent
1993-11-23
1996-02-27
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 17, 3701051, 3701052, 371 201, 375362, 379 14, 379 15, 379 33, H04J 314
Patent
active
054954703
ABSTRACT:
A DS3 level access, monitor and test system for a telephone network. The system provides selective, and hitless, bit overwrite in any of the embedded DS1, DS0 and subrate channels in a DS3 signal. Multiple DS0 and subrate channels can be tested via the asynchronous time slot interchange in conjunction with the recombiner of the present invention. The present invention further includes a lookahead reframer for framing to the DS3 signal. The present invention also includes a facilities data link (FDL) handler for capturing the FDL channel data in every DS1 channel in a DS3 signal. A high speed bit-for-bit compare is interfaced to a protect path to provide 1:1 fault protection in the system of the present invention. Full time performance monitoring on DS1 and DS3 signals is performed by a shared resource. The system of the present invention provides an integrated approach to synchronization measurement and relative synchronization, and also provides alarm correlation and hierarchical event filtering.
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Hartmann Paul R.
Tyburski Edward
Applied Digital Access, Inc.
Blum Russell W.
Olms Douglas W.
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