AT&T MERLIN 410 Service Manual page 44

Step 1. Test all suspected voice terminals by making outward and intercom (inside) calls
and using all suspected features. Your Users Guide explains how to use each
feature.
The trouble does NOT appear on calls
outside of your business,
The trouble does appear on outside
calls,
You have a standard telephone with a
modular cord/plug (it must also be
compatible with the tone or rotary
dialing service provided by the local
telephone exchange service company),
You do not have a standard telephone
with a modular cord/plug,
Remove the line cord (D4CH) from the network interface.
Step 2.
Plug the standard telephone into the network interface of the outside line on which
Step 3.
the trouble appeared and make an outward call. (The label on the line cord gives
the telephone number of the network interface into which the cord is plugged.)
Note: A MERLIN voice terminal will not work for this purpose.
The trouble appears on the standard
telephone,
The trouble does NOT appear on the
standard telephone,
IF
IF
THEN
The trouble is caused by some com-
ponent of your system. Go to the
Symptom-Based Quick Checks.
Either the local telephone exchange
service company equipment or your
system could be the cause. Continue.
Go on to Step 2.
Call the local telephone exchange ser-
vice company to inquire about the
line(s) or call the HELP number
(1-800-628-2888).
THEN
The trouble is caused by local tele-
phone exchange service company
equipment. Call the your local tele-
phone exchange service company.
The trouble is caused by your
MERLIN communications system. Go
on to the section on "Symptom-Based
Quick Checks."
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