IBM 3745 Problem Determination Manual page 296

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3
Check visually that:
• The LlC and line cables are correctly connected .
• The LlC is operational (not in use with a PKD). The green lamp should be on.
If not, ask the host operator to activate the line if possible.
- When the green light is on, DTR is on.
- When the yellow light is on, the LlC is faulty.
- When green and yellow lights are blinking, the LlC has been plugged into
the wrong slot.
- If it concerns a 56 kbps LlC6, two cases may happen:
1. The LlC is alone on the pair of slots and plugged into the even position.
The leds are not blinking but a message displayed on the console
advise you to plug the 56 kbps Lle6 into-the odd position.
2. A LlC5 or Lle6 (low speed) is plugged into one slot, and a 56 kbps Lle6
is plugged into the other one of the pair of slots. The leds are blinking
and a message is displayed on the console saying: THE LlC IS NOT
PRESENT. Plug the 56 kbps Lle6 into the odd position and remove the
other LlC. When a 56 kbps Lle6 is plugged (in the odd position of a
pair of slot), no other Lie must be plugged in the even position.
- To check the lights, plug the PKD in (refer to Figure 9-4 on page 9-47 for
connection); press the Go or Stop key; then the green and yellow lights
shou Id be on.
- When the PKD is connected, if .a Lle5 or a L1C6 is misplugged, the
message 'WRONG SLOT' is displayed on the PKD.
• The LlC is correctly configured. See the 3745 Connection and Integration
Guide.
4
Make sure that the remote control unit and modem are operational.
5
Perform L1C tailgate data wrap test, using the wrap plug. For a complete
description of this test, see Chapter 16.
If the test fails, go to step 6.
If correct, reactivate the line, restart the application, and go to step 8.
If the application still fai Is, go to next step.
Chapter 9. LlC and Line Problems (LSS)
9-45