DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Alarms, Errors, and Troubleshooting
5-45ATM Tips
5
■The Result should be PASS for eac h test number. If the any of the
tests fail, refer to ‘‘ATM-BCH (ATM B-Channel Trunk)’’ in Chapter 9.
Possible Causes
1. The TN230X board is in a slot different from the DEFINITY administration.
2. The TN230X did not complete board insertion.
Physical Layer
Is there an optical signal between the TN230X and the A500?
1. Does the TN230X’s yellow LED flash 100ms on/100ms off, indicating a
loss of signal on the fiber? Recall that the TN230X detects continuity
problems with either the Transmit (bottom) or the Receive (top ) fibers.
If there is loss of signal on the fiber, refer to the ‘‘Fiber Fault Isolation
Procedure’’ in this chapter.
2. Is the A500 port’s CD LED off, indicating a loss of signal on the fiber? Note
that the A500 detects conti nuity problems only with the Receive
(right-hand) fiber; the state of the Transmit (left-hand) fiber is not d etected.
3. Enter show signaling summary on the A500 console. Figure 5-25 shows
the screen output.
Figure 5-25. A500: show signaling summary screen
Ensure that the fields have the values indicated below.
SAP State Up
If it is PHY_DOWN or DOWN, then there is probably a loss of signal
on the port in question. This command detects a continuity
problem only with the Receive (right-hand) fiber; it does not
detect the state of the Transmit (left-hand) fiber.
State The value of may be UP or DOWN, depending on the
administration of the port. It may be necessary to
re-administer the A500 port b oards. Refer to the

Cajun

A500 Quick Reference

for further information.
A500:show signaling summary
Port loc VCI SAP IntType Signaling ILMI SAP State State
------ ------- --- ------- ----------- ---- ------------ -----
A1.1 1 1 Network UNI3.1 No UP UP
A1.2 2 2 Network UNI3.1 No UP UP