Directory number translation in a distributed control switching

Details Directory number translation in a distributed control switching Directory number translation in a distributed control switching

1985-02-07

1987-07-28

Brown, Thomas W.

Telephonic communications

Centralized switching system

Switching controlled in response to called station...

379289, H04Q 347

Patent

active

046835849

ABSTRACT:
A distributed control switching system where the system control units cooperatively perform the terminating port determination function. In particular, the directory number translation function is done in a manner allowing flexibility in assigning directory numbers to switching system ports but minimizing the magnitude of the storage facilities required in each control unit. Each control unit stores the complete directory number translation for certain directory numbers but stores an index referencing other control units for the other directory numbers. Advantageously, the control units referenced are not necessarily the same ones that are associated with the ports defined by those other directory numbers. Thus the call setup sequence frequently involves three control units-the units associated with the originating and terminating ports, and an intermediate unit which stores the directory number translation information for the received directory number. Thus a rigid assignment of a predetermined block of directory numbers to all ports associated with a given control unit is not required.

REFERENCES:
patent: 3643032 (1972-02-01), Ulrich et al.
patent: 3860761 (1975-01-01), O'Neill, Jr.
patent: 4210782 (1980-07-01), Fujita
patent: 4256926 (1981-03-01), Pitroda et al.
patent: 4259549 (1981-03-01), Stehman
patent: 4317962 (1982-03-01), Cox et al.
patent: 4322843 (1982-03-01), Beuscher et al.
patent: 4340776 (1982-07-01), Ganz et al.
patent: 4421955 (1983-12-01), Mori et al.
patent: 4442321 (1984-04-01), Stehman
patent: 4558444 (1985-12-01), Kennedy et al.
H. Takeda et al., "Time Division Switching Control System", Review of the Electrical Communication Laboratories, vol. 27, No. 9-10, Sep.-Oct. 1979, pp. 773-782.
G. Becker et al., "Call Processing in a Distributed Control System", ICC '80 Conference Record, vol. 3 of 3, Jun. 8-12, 1980, pp. 46.4.1-46.4.7.
D. Jackson and K. Patfield, "Impacts of Multiprocessing on GTD-5 EAX Call Processing and Operating System", ISS '81 CIC Montreal 21-25, Sep. 1981, pp. 1-7.
M. Akiyama et al., "Time Division Distributed Switching System", ISS '81 CIC Montreal, 21-25, Sep. 1981, pp. 1-7.
U.S. patent application of M. M. Chodrow et al., Case 1-1-3-4, "Switching System Having Remote Switching Capability", Ser. No. 493,683, filed May 11, 1983.

Affiliated with

Also associated with

Rating

Directory number translation in a distributed control switching does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Directory number translation in a distributed control switching , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Directory number translation in a distributed control switching will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2038578