Switching system for electronic switcher

Details Switching system for electronic switcher Switching system for electronic switcher

1992-07-10

1994-07-26

Dwyer, James L.

Telephonic communications

Plural exchange network or interconnection

379230, 379279, H04M 700, H04M 906

Patent

active

053331877

ABSTRACT:
A switching control system is provided for an electronic switcher employing a common channel signalling. This system is designed to keep the common channel signalling for a speech path in parallel to the associated signalling system, invalidate the speech information in the associated signalling system for a speech path if the signal link is in a normal state and control the speech path in the common channel signalling system, and if failure takes place on the signal link, control the speech path in the associated signalling system.

REFERENCES:
patent: 4455645 (1984-06-01), Mijioka et al.
patent: 4602363 (1986-07-01), Das et al.
patent: 4625082 (1986-11-01), Kelly
Telephony Magazine article entitled "Gazing into the SPC Network future reveals vista of new features" by Gordon et al. pp. 86, 88, 93, Feb. 21, 1983.
"II C.C.I.T.T. Signalling System No. 6" by Grandjean et al., Source publication: Het PTT-Bedrijf, vol. 19, No. 1-2, pp. 14-23 (Sep. 1974).
Institution of Electrical Engineering Report, 1979 "Signalling in Telecommunications Networks" by Welch pp. 260-321.
Telephony Magazine "Common channel Signalling based on CCITT system No. 7" pp. 85-98, Feb. 9, 1981.
Ericsson Review No. 2, 1982 "CCITT Signalling system No. 7 in AXE 10" by Rietz and Giertz pp. 101-105.

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