IBM 3745 Problem Determination Manual page 279

Problems on One Line Only (LIC1 to LlC4)
C is OFF:
Perform a tailgate wra·p test (see Chapter 16). Then return here to analyze the results.
T~~~eWrnpTe~R~uHs~~~~~~~~~~~~~~~~~~~~~~~~~~~~
• Test not successful: Replace the LlC. Follow the procedure "Problems on All Lines of a L1C"
from step 7 on page 9-5.
• Test successful: Check with the network operator the compatibility of line parameters at both
ends of the line.
If they are correct, suspect the host software, otherwise, go to step 11 on page 9-11.
C is ON and I is OFF:
Check that the remote control unit is ready and operational. If it is,
perform a tailgate wrap test (see Chapter 16). Then return here to analyze the results.
Tailgate Wrap Test Results
~~~~~~~~~~~~~-~~-~------'---------.
• Test not successful: Replace the L1C, Follow the procedure "Problems on All Lines ·of a L1C"
from step 7 on page 9-5.
• Test successful:
- Go to step 11 on page 9-11.
C and I are both ON:
Check that the remote control unit is ready and operational. If it is, perform
a tailgate wrap test (see Chapter 16). Then return here to analyze the results.
Tailgate Wrap Test Results
-~-~~~~~~~--~~~~~~~~~-~~-~---.
• Test not successful: Replace the L1C. Follow the procedure "Problems on All Lines of a L1C"
from step 7 on page 9-5.
• Test successful, check:
Remote control unit. Perform appropriate remote control unit tests·.
With the network operator, the compatibility of line parameters at both ends of the line.
Network.
If the problem is not fixed, go to step 11 on page 9-11.
If on the·screen, the STATUS of
Perform the following ACTIONS:
the data set lead is:
TOFF DTE not ready:
C OFF
-
Check the line parameters (Press FS).
-
If the problem persists, contact the appropriate
service representative.
R OFF Remote 3745 attachment not ready:
I OFF
-
Check cable installation.
-
Check remote
3~45
to ensure line is ACTIVE.
9-28
IBM 3745 Communication Controller: Problem Determination Guide
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