Special automatic trunk testing arrangement

Details Special automatic trunk testing arrangement Special automatic trunk testing arrangement

1976-04-20

1977-11-01

Olms, Douglas W.

179 7R, H04M 322

Patent

active

040566986

ABSTRACT:
An automatic trunk test arrangement is disclosed which performs transmission path monitoring on idle trunks in the normal manner and which routinely scans the supervisory states of trunks primarily for call charging purposes. When predetermined supervisory states are detected at any trunk, the routine testing of idle trunks is interrupted. The identity of the idle trunk under test is stored, and the test multiple is seized to connect the busy trunk exhibiting the predetermined supervisory states to the test multiple so that call signalling appearing on its transmission path conductors may be monitored. The connection of the transmission path monitoring apparatus is thus restricted to only those busy trunks exhibiting a predetermined supervisory state.

REFERENCES:
patent: 2688658 (1954-09-01), Carpenter
patent: 2848543 (1958-08-01), Breed et al.
patent: 3188401 (1965-06-01), Barrett et al.
patent: 3829627 (1974-08-01), Short et al.
patent: 3875351 (1975-04-01), Kennedy
patent: 4001513 (1977-01-01), Naylor
Bell Lab Record, June 1956, pp. 223-226, by R. F. Dusenberry

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