Line accommodation circuit capable of switching from an active s

Details Line accommodation circuit capable of switching from an active s Line accommodation circuit capable of switching from an active s

1993-12-07

1995-04-11

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 60, 371 81, 340827, H04J 116, H04L 1226

Patent

active

054065488

ABSTRACT:
A line accommodation circuit for use in combination with a cell exchange apparatus to convert a sequence of input data signals into a sequence of asynchronous transfer mode cells is provided with two function systems which are identical in structure. The systems receive the input data signals in parallel and are switched from an active system to a standby system by a switching operation indicated by a system controller. Switching is affected by inserting a test cell in the active system after a last one of the asynchronous transfer mode cell held in the active system, and placed in the standby system before a following asynchronous transfer mode cell. The test cell is first detected by the standby system and thereafter by the active system, at which time the next asynchronous transfer mode cells are sent from the standby system which is rendered into a new active system.

REFERENCES:
patent: 5295134 (1994-03-01), Yoshimura et al.

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