Method for releasing unnecessary trucks from a telephone call

Details Method for releasing unnecessary trucks from a telephone call Method for releasing unnecessary trucks from a telephone call

1993-06-30

1995-08-22

Dwyer, James L.

Telephonic communications

Plural exchange network or interconnection

379225, 379229, 379207, 379212, H04M 342, H04M 700

Patent

active

054447739

ABSTRACT:
A method for recognizing and releasing unnecessary trunk lines in a private branch exchange telephone system including a plurality of switching nodes, each having a unique node identification number where each pair of nodes is connected by a plurality of trunk lines, includes steps for (a) compiling a telephone call identifier list containing node identification numbers and an associated trunk call identification number used in defining and connecting a call path between a calling party and a called party, (b) examining a call identifier list at each of the switching nodes for information indicative of redundant node identification numbers, and (c) releasing the unnecessary trunk lines between the redundant node identification numbers.

REFERENCES:
patent: 4293735 (1981-10-01), Duret
patent: 4345116 (1982-08-01), Ash et al.
patent: 4398063 (1983-08-01), Hass et al.
patent: 4756019 (1988-07-01), Szybicki
patent: 4788721 (1988-11-01), Krishnan et al.
patent: 4873517 (1989-10-01), Baratz et al.
patent: 4896350 (1990-01-01), Bicknell et al.
patent: 4991204 (1991-02-01), Yamamoto et al.
patent: 5014262 (1991-05-01), Harshavardhana
patent: 5018187 (1991-05-01), Marinho et al.
patent: 5018194 (1991-05-01), Suzuki et al.
patent: 5058105 (1991-10-01), Mansour et al.
patent: 5101451 (1992-03-01), Ash et al.
patent: 5142570 (1993-08-01), Chaudhary et al.
patent: 5212691 (1993-05-01), Hokari
patent: 5319640 (1994-06-01), Yamasaki et al.
"AT&T Integrated Services Digital Network (ISDN) Primary Rate Interface and Special Application Specification User-Network Interface Description"; Jul. 1989.
"AT&T Integrated Services Digital Network (ISDN) Primary Rate Interface Specification", Jul. 1989.
"ISDN: Concepts, Facilities, and Services", Gary C. Kessler Copyright 1990 McGraw Hill Inc, pp. 125-144, Appendix C.
Northern Telecom Primary Rate Interface Doc. No. NIS A211-1 of Jan., 1992 (Section E. p. E-32).
British Telecom Doc. No. 188 of Sep. 1984 entitled "Digital Private Network Signalling System" No. 1 (DPNSS 1) (BTNR 188), (Sec. 11, pp. 4-6,22-24)(Sec. 19, pp. 1-12).

Affiliated with

Also associated with

Rating

Method for releasing unnecessary trucks from a telephone call does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for releasing unnecessary trucks from a telephone call, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for releasing unnecessary trucks from a telephone call will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2147808