IBM 3745 Problem Determination Manual page 271

Problems on One Line :Only (LIC1 to LIC4)
Note: When using an autocall unit:
• Under
NCP,
tailgate wrap tests are not supported on dialing lines.
• Under EP, you must use the wrap type 'control leads'.
V .25 Call-out Analysis
The following table may help you continue the problem determination on call-out operations. For
call-in problems, refer to the table on page 9-17, in this case, CCIlT V.2S is similar to CCITT V.24.
If on the screen, the STATUS of Perform the following ACTIONS:
the data set lead is:
PWIOFF
-
Check if the automatic calling unit (ACU) is
powered ON.
-
Check the ACU-to-DTE cable connection.
CRQ OFF Activate the ACU line (host
side)~
OLO OFF
-
Check the ACU.
-
Suspect the ACU-to-DCE cable.
PNO does not flash
-
Check the ACU.
-
Suspect the ACU-to-DCE cable.
-
If the cable is OK, suspect the network.
OPR does not flash
-
Check the ACU-to-DCE cable.
-
If OK, contact the appropriate service representative.
ACR ON
-
Check the ACU line.
-
If OK, suspect the network.
RSE OFF (OSC)
-
Check the ACU line. If OK, suspect the network.
-
Press F6 to display the Line Parameter screen.
-
Enter the address of the data transmission line,
then press SEN D.
-
Check the line parameters.
-
Press F7 to display the data set leads according to
the V.24 - Switched DCE Attachment list, on
page 9-17.
9-20
IBM 3745 Communication Controller: Problem Determination Guide
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