Inter digital switching equipment relay system and digital switc

Details Inter digital switching equipment relay system and digital switc Inter digital switching equipment relay system and digital switc

1995-09-22

1998-02-03

Chin, Wellington

Multiplex communications

Fault recovery

Bypass an inoperative channel

370229, 370232, H04L 1226

Patent

active

057152373

ABSTRACT:
An ATM cell transferred from a first ATM node to a second ATM node is, in a normal state, transmitted to a line control unit from an ATM cell switch within the first ATM node and sent to a trunk line therefrom. when a usage of a buffer connected within this line control unit comes to a fixed threshold value or larger, in the line control unit for sending the ATM cell to the ATM cell switch, routing (TAG) data added to a header part of the ATM cell belonging to a low-quality connection among connections directed to the second ATM node is so rewritten as to be directed to the line control unit. The relevant cell is sent forward to the line control unit and transferred to the second ATM node via a backup line.

REFERENCES:
patent: 5239537 (1993-08-01), Sakauchi
patent: 5285441 (1994-02-01), Bansal et al.
patent: 5343462 (1994-08-01), Sakihata et al.
patent: 5367562 (1994-11-01), Tourbah et al.
patent: 5420861 (1995-05-01), De la Bourdonnye
patent: 5436886 (1995-07-01), McGill

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