Communication system, relay apparatus, end system, and...

Details Communication system, relay apparatus, end system, and... Communication system, relay apparatus, end system, and...

2005-02-15

2005-02-15

Nguyen, Brian (Department: 2661)

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

C370S237000, C370S242000, C370S278000

Reexamination Certificate

active

06856593

ABSTRACT:
In a relay apparatus, when an error of the next relay destination is detected at the time of reception of a connection establishment request, the connection establishment request is refused by a connection negative response unit and a negative response relay unit, and a negative response is transmitted to a relay source. When the negative response is received from the relay destination, a connection establishment requesting unit of an end system of a communicating source again issues a connection establishment request in which another relay destination has been selected without notifying an application of a failure of the connection establishment, and establishes a connection to a communicating destination end system by another path.

REFERENCES:
patent: 5293295 (1994-03-01), Nishitani
patent: 5361256 (1994-11-01), Doeringer et al.
patent: 5832036 (1998-11-01), Nakamura
patent: 6470453 (2002-10-01), Vilhuber
patent: 6487218 (2002-11-01), Ludwig et al.
patent: 6490289 (2002-12-01), Zhang et al.

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