Isolating And Correcting Troubles; Troubleshooting Chart - AT&T MERLIN 820 Administration Manual

Isolating and Correcting Troubles

If something goes wrong in the operation of your MERLIN system, use the following troubleshooting chart to determine
the possible cause of the problem. In many cases, you can clear the trouble yourself without the need for a service call.

Troubleshooting Chart

Trouble
You cannot make an outside call.
All voice terminals are dead; that is,
there are no lights, no dial tone.
The red warning light on the control
unit is lit.
18
Possible Cause
The telephone company lines maybe
faulty.
The Outward Calls switches on the
control unit are set to No (down).
The Tone/Pulse switch on the control
unit is not set correctly.
All connections may not be secure.
There is no power to the control unit.
The cartridges may be loose.
Do This
Plug a standard modular telephone into
the telephone company wall jack for your
incoming line that has the trouble.
If you experience the same problem when
you use the standard modular phone,
report the trouble to your local telephone
company.
Set Outward Calls switches to Yes (up).
Set the Tone/Pulse switch to Pulse. If you
purchase Touch-Tone service from the
telephone company, set the switch to
Tone.
Check the connections plugged into each
voice terminal, the control unit, and the
telephone company line jacks.
If there are any loose connections, make
them secure.
If the green light on the control unit is off,
plug something else into the ac outlet to
see if it is supplying power. (Make sure the
control unit is not plugged into a switch-
controlled outlet.)
Unplug the control unit.
Make sure that all cartridges are firmly
seated in the control unit slots.
Plug in the control unit.
Wait for a full 5 minutes.
If the red light goes out (and stays out), the
trouble is cleared up.
If the red light remains on, call your equip-
ment supplier.