14-50
Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 14 Alarm Troubleshooting
Alarm Procedures
Caution
Always use the supplied ESD wristband when working with a powered ONS 15327. Plug the wristband
cable into the ESD jack located on the lower-right outside edge of the shelf assembly.
Note
The procedure assumes that the BITS timing reference signal is functioning properly. It also assumes the
alarm is not appearing during node turn-up.
Procedure: Clear the LOF Alarm
Step 1
Verify that the line framing and line coding match between the BITS input and the XTC:
a.
In CTC node view or card view, note the slot and port reporting the alarm.
b.
Find the coding and framing formats of the external BITS timing source. This should be in the user
documentation for the external BITS timing source or on the timing source itself.
c.
Click the
Provisioning >
Timing
tabs to display the General Timing window.
d.
Verify that
Coding
matches the coding of the BITS timing source (either B8ZS or AMI).
e.
If the coding does not match, click
Coding
to reveal a menu. Choose the appropriate coding.
f.
Verify that
Framing
matches the framing of the BITS timing source (either ESF or SF [D4]).
g.
If the framing does not match, click
Framing
to reveal the menu. Choose the appropriate framing.
Note
On the timing tab, the B8ZS coding field is normally paired with ESF in the Framing field,
and the AMI coding field is normally paired with SF (D4) in the Framing field.
Step 2
If the alarm does not clear when the line framing and line coding match between the BITS input and the
XTC, replace the XTC card.
Note
When you replace a card with an identical type of card, you do not need to make any changes to
the database.
14.4.68 LOF (DS1)
•
Major, Service-Affecting
The LOF alarm indicates that the receiving ONS 15327 has lost frame delineation in the incoming data.
If the LOF appears on the XTC-14 card, the transmitting equipment may have its framing set to a format
that differs from the receiving ONS 15327.
Procedure:
Clear the LOF Alarm on the XTC-14 Card
Step 1
Verify that the line framing and line coding match between the XTC-14 port and the signal source:
a.
In CTC, note the slot and port reporting the alarm.
Содержание ONS 15327
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Страница 82: ...1 32 Cisco ONS 15327 User Documentation R3 3 June 2002 Chapter 1 Hardware Installation Hardware Specifications ...
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Страница 254: ...7 22 Cisco ONS 15327 User Documentation R3 3 June 2002 Chapter 7 Card Provisioning Using Virtual Wires ...
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