Telephonic communications – Plural exchange network or interconnection – Connection call model
Patent
1989-11-09
1991-02-05
Schreyer, Stafford D.
Telephonic communications
Plural exchange network or interconnection
Connection call model
379113, 340827, H04Q 354, H04M 706, H04M 336
Patent
active
049912046
ABSTRACT:
In a telecommunications network in which a plurality of switching nodes are interconnected via links each composed of a plurality of trunks and are each connected to a network control center via a control signal link, the network control center determines for each switching node a predetermined number of alternate routes for each first route on the basis of traffic data in the telecommunications network and supplies them as a set of available alternate routes to the switching node. The switching node assigns one or more of the available alternate routes in advance. The switching node responds to a call-connection request to try to connect the call to the first route, and when having failed in the call connection, the switching node retries the call connection through one of the assigned routes.
REFERENCES:
patent: 4284852 (1981-08-01), Szybicki et al.
patent: 4788721 (1988-11-01), Krishnan et al.
Hoshi Yoshitaka
Inoue Akiya
Itou Hiroo
Mase Ken-ichi
Suyama Masato
Nippon Telegraph and Telephone Corporation
Schreyer Stafford D.
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