Method for testing the line connection before switching from a t

Details Method for testing the line connection before switching from a t Method for testing the line connection before switching from a t

1991-08-14

1993-12-28

Kuntz, Curtis

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

With blocking of normal usage

379 10, 379279, H04M 712

Patent

active

052746925

ABSTRACT:
Given simultaneous connection of the subscriber line circuits by way of a main distributor to a new switching center and to an existing or old switching center, the subscriber terminals are successively selected proceeding from the new switching center and the old switching center produces connections from a test terminal to these subscriber line circuits. A tone generator of the new switching center supplies a test code word by way of these connections that proceeds via a termination-associated test connection contact and via an external test bus to a code character receiver of the new switching center and is checked therein for coincidence with the test code word.

REFERENCES:
patent: 4453048 (1984-06-01), Daniels et al.
patent: 4653043 (1987-03-01), Brady et al.

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