Arrangement for providing private-network line features on centr

Details Arrangement for providing private-network line features on centr Arrangement for providing private-network line features on centr

1996-06-04

1998-10-20

Hong, Harry S.

Telephonic communications

Centralized switching system

Class of service determination or transmission

379157, 379198, 379201, 379225, H04M 342

Patent

active

058258680

ABSTRACT:
A telephone central office switch (103) provides Centrex features, including intercom dialing, on central-office-to-PBX (133, 134) trunks (123, 124) by using the 4-wire subscriber feature of the Lucent Technologies 5ESS.RTM. switch to administer trunk ports (113-114) that serve the central-office-to-PBX trunks as 4-wire telephone lines and then further administering those trunk ports for Centrex features. Those trunk ports, and optionally also some line ports (115-116), may be administratively assigned the private network numbering plan of respective PBXs so as to enable intercom dialing among those trunk ports, and between those trunk ports and the optional line ports.

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Bell System Information, AT&T Provisional, CSS-INF-PKG A/B, Issue 2, Jan. 1976, PBX-Centrex Customer Switching Systems Information Package, pp. A-1/A-2 and B-1 through B-24.
J. R. Abrahams, Manager's Guide to Centrex, Artech House, pp. 1-67.

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