Data link access unit for T1 spans supporting the extended super

Details Data link access unit for T1 spans supporting the extended super Data link access unit for T1 spans supporting the extended super

1994-03-16

1996-04-30

Chin, Wellington

Multiplex communications

Wide area network

Packet switching

3701101, H04J 314, H04L 1226

Patent

active

055131735

ABSTRACT:
A data link access unit for insertion into a T1 span supporting the extended superframe (ESF) format includes an interface for accessing the frames of digital data carried by the T1 span in ESF format (including the data link bits) and calculating performance monitoring data for the T1 span. The interface is controlled by a processor that can access this performance monitoring data and also communicate message data over the data link channel via the interface. Additionally, the unit can provide an ESF/SF interface when inserted into a T1 span between a first channel bank supporting ESF and a second channel bank that does not support ESF.

REFERENCES:
patent: Re33900 (1992-04-01), Howson
patent: 4316284 (1982-02-01), Howson
patent: 4507780 (1985-03-01), Perry
patent: 4797654 (1989-01-01), Young et al.
patent: 5063564 (1991-11-01), Crandall et al.
patent: 5224108 (1993-06-01), McDysan et al.
patent: 5347576 (1994-09-01), Taylor

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