ATM Tips
Issue 1 May 2002
4-45
555-233-143
■
The
Result
should be
PASS
for each test number. If any of the
tests fail, refer to
‘‘ATM-BCH (ATM B-Channel Trunk)’’ on page
Possible Causes
1. The TN230X board is in a slot different from the S8700 Multi-Connect
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 amber 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
‘‘Fault Isolation for Fiber Links’’
2. Is the A500 port’s CD LED off, indicating a loss of signal on the fiber? Note
that the A500 detects continuity problems only with the Receive
(right-hand) fiber; the state of the Transmit (left-hand) fiber is not detected.
3. Enter show signaling summary on the A500 console.
shows
the screen output.
Figure 4-25.
A500: show signaling summary screen
Ensure that the fields have the following indicated values.
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 boards. 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
Summary of Contents for S8700 Series
Page 50: ...Maintenance Architecture 555 233 143 1 26 Issue 1 May 2002 ...
Page 74: ...Initialization and Recovery 555 233 143 3 12 Issue 1 May 2002 ...
Page 186: ...Alarms Errors and Troubleshooting 555 233 143 4 112 Issue 1 May 2002 ...
Page 232: ...Additional Maintenance Procedures 555 233 143 5 46 Issue 1 May 2002 ...
Page 635: ...status psa Issue 1 May 2002 7 379 555 233 143 status psa See status tti on page 7 406 ...
Page 722: ...Maintenance Commands 555 233 143 7 466 Issue 1 May 2002 ...