Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
Patent
1989-04-21
1990-07-24
Dwyer, James L.
Telephonic communications
Plural exchange network or interconnection
With interexchange network routing
379229, H04M 700
Patent
active
049439987
ABSTRACT:
A communication network having exchanges and groups of communication lines between the exchanges. Subscriber calls initiate forward messages over all possible groups of communication lines to search for the called party at every exchange. Each exchange includes a terminal module which is callable and capable of calling like a subscriber and which stores data about traffic and the exchange operation, and an external interface. A portable operating station can connect to the interface at any exchange of the network and call every terminal module over the communication lines to determine the network topology and condition.
REFERENCES:
patent: 3591724 (1971-07-01), Yako
patent: 4284852 (1981-08-01), Szybicki et al.
patent: 4644532 (1987-02-01), George et al.
patent: 4741027 (1988-04-01), Maisel et al.
patent: 4756019 (1988-07-01), Szybicki
Dwyer James L.
Lobato Emmanuel J.
U.S. Philips Corp.
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