IBM 5280 Manual page 252

C D
I I
COMMUNICATION MAP
MANUAL CALL
PAGE 2 OF 5
004
Disconnect from the telephone
line and connect the telephone
directly to the line at the
wall-
level).
mounted
connector
(ENTRY POINT B)
- Dial another telephone.
Can you communicate correctly?
Y N
005
Ask the
c~~tomer
to call the
PTT representative.
006
(ENTRY POINT C)
With an ohmmeter, check the
telephone cable(s) from the
line plate to the wall-mounted
connector. See MIM 869 to
find the failure.
Is the cable(s) correct?
Y N
007
Suspect the cable(s).
008
Defective
plate.
009
World Trade line
- Disconnect the jack.
GO TO STEP 004,
ENTRY POINT B.
MAP 3017-2
Dial tone present~ called
telephone rings and connection is
made.
Suspect a short circuit in the
connection.
EC840874 PEC839787
MAP 3017-2