Standalone Telephone Unit
17
751221
13.
Measure the voltage across the terminals of J4 on the main PCB of the unit.
The voltmeter should register 23 to 25V dc with the subscriber telephone
on-hook.
14.
Ensure that there are no excess wires dangling into the isolation gap
between the Station and CO side circuits. Then close and secure the shelf
cover with the captive screws.
15.
Verify that the unit is functioning as it should by checking that an applied
signal is correctly received.
Note
Not all applications of the Standalone Telephone Unit, model 751221,
require a remote ground connection.
Summary of Contents for Teleline 751221
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