AT&T Merlin 820 Service And Maintenance Manual page 63

Trouble on More Than One Voice Terminal
B. Remove the modular line cord from the network interface for the line
with trouble. Connect the standard modular telephone to the net-
work interface using the cord of the standard modular telephone (see
Figure 29). If a two-line or eight-line adapter is present, connect
through it.
Figure 29—Plugging the PFTT Cord into the Network Interface
Step 12. Place an outside call using the standard modular telephone, and make a
note of what happens.
IF
The trouble is no longer present on
the outside line,
The trouble is still present on the
outside line,
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POWER FAILURE
TRANSFER
TELEPHONE CORD
Go on to Step 13.
The trouble is caused by local tele-
phone company equipment exter-
nal to your communications sys-
tem.
or eight-line adapter connect-
ing the line with trouble to the
network interface. If you
have not checked the adapter,
it could be causing the trou-
ble.
phone company to report the trou-
ble, write down the telephone
number of the line with trouble
and go to Step 17.
(REMOVE)
POWER FAILURE
TRANSFER
TELEPHONE
THEN
You may have a two-line
Before calling your local tele-
NETWORK
INTERFACE