Telephonic communications – Plural exchange network or interconnection – Connection call model
Patent
1985-10-01
1987-08-04
Dwyer, James L.
Telephonic communications
Plural exchange network or interconnection
Connection call model
379291, 379210, 379273, H04M 712, H04Q 348
Patent
active
046851275
ABSTRACT:
A method of providing equal access to a number of long distance carriers in local telephone company office containing No. 5 crossbar switching machines. Calls are intercepted between the line link frame and the originating registers. If the call is a long distance call, a serial number which resembles a conventional phone call is inserted in the calls place. The called number is stored and the appropriate carrier is determined by locating the calling party's pre-selected carrier choice in telephone company records. When the call identified by the serial number exits the switch it is automatically routed to the correct long distance carrier.
REFERENCES:
patent: 4594477 (1986-06-01), Noirot
System Contact-Central Office Network Access, Northern Telecom Trade Brochure, 1984.
Toll Access Trunk-System (TATS) for Equal Access Applications, Science Dynamics Corporation Brochure, No Date.
E.A.A.S.-Equal Access Adapter System-Product Description TCI Tel-Control Inc. Trade Brochure, Jan. 1985.
No. 5 Crossbar System-General Descriptive Information Bell System, 6-1975.
Atkinson Roger
Coleman Hollis
Dorsey Boyd
Miller Arthur O.
Dwyer James L.
Kalishman Neal
Southwestern Bell Telephone
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