Remote loop-around carrier test system

Details Remote loop-around carrier test system Remote loop-around carrier test system

1984-06-25

1986-04-15

Schreyer, Stafford D.

17917531R, H04B 346

Patent

active

045829640

ABSTRACT:
A testing system for testing a selected telephone carrier channel wherein that channel is selectively interrupted at a selected repeater station along its route and bi-directionally looped back for testing. Selection and the looping back process is controlled by a central control unit located at a central telephone exchange and remote control units located at repeater stations. Significantly, the central unit is operated by a dialed telephone call to it, and responsive to additionally dialed digits, it effects the selection of the particular route for the channel in question and a particular repeater station and channel. Actual looping back is effected by a transformer coupling arrangement which additionally provides for the D.C. integrity of the channel.

REFERENCES:
patent: 3371165 (1968-02-01), Earle et al.
patent: 3943305 (1976-03-01), Hagedorn
patent: 3959606 (1976-03-01), Merlet et al.
patent: 4380810 (1983-04-01), Canniff

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