Patent
1982-12-01
1984-06-12
Schreyer, Stafford D.
17917523, 1791752B, H04M 326
Patent
active
044543883
ABSTRACT:
An arrangement for testing a plurality of subscriber lines, which are operationally connected to an electromechanical switching system is shown. Operational service is to be transferred from the electromechanical switching system to a digital switching system. This arrangement provides for automatically verifying the connection of the subscriber lines to the digital switching system and determining whether the proper ring signalling is transmitted to each subscriber.
REFERENCES:
patent: 3752940 (1973-08-01), Santulli et al.
patent: 3892928 (1975-01-01), Casterline et al.
Daniels William R.
Young John S.
Bogacz Frank J.
GTE Automatic Electric Inc.
Schreyer Stafford D.
Xiarhos Peter
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