AT&T Merlin 820 Service And Maintenance Manual page 46

VOICE TERMINAL
(WITH TROUBLE)
103A MODULAR
JACKS
VOICE TERMINAL
(WITHOUT TROUBLE)
Figure 16—Switching Jumper Cords
Switch the jumper cord of the voice terminal on which trouble appears
Step 6.
and the jumper cord of the voice terminal with no trouble (see Figure 16).
On both voice terminals, perform the action that first revealed the trouble.
Step 7.
The trouble appears on the voice
terminal that at first had no trou-
ble,
The trouble appears on the voice
terminal on which it first
appeared,
IF
Trouble on One Voice Terminal
JUMPER
CORDS
JACK FIELD
THEN
Trouble found. It is caused by
the jumper cord connected to the
voice terminal that now has the
trouble. Replace the cords as they
were and obtain a replacement for
the defective one.
Read the section on Maintenance
Exchange Procedures at the end of
this manual.
Replace the voice terminal cords as
they were.
Go on to Step 8.
CONTROL UNIT
Page 43