Specifications

1-47

Cisco ONS 15454 Troubleshooting and Maintenance Guide

November 2001

Chapter 1 Alarm Troubleshooting

e. Verify that the line type of the reporting port matches the line type of the signal source.

f. If the signal source line type does not match the reporting port, click Line Type to reveal a menu.

Choose the matching type.

g. Verify that the reporting Line Coding matches the signal source’s Line Type.

h. If the signal source line coding does not match the reporting port, click Line Coding to reveal the

menu. Choose the matching type and click Apply.

Note On the Line tab, the B8ZS coding field is normally paired with ESF in the Framing field.

AMI coding is normally paired with SF (D4) in the Framing field.

Step 2 If the alarm does not clear when the coding and framing of the ONS 15454 match the coding and framing

of the signal source, replace the DS-1 card.

Note When you replace a card with an identical type of card, you do not need to make any changes

to the database.

1.3.68 LOF (DS3XM-6)

• Critical, Service affecting

Loss of Frame (LOF) indicates that the receiving ONS 15454 has lost frame delineation in the incoming

data. If the LOF appears on the DS3XM-6 card, the framing of the transmitting equipment may be set to

a format that differs from the receiving ONS 15454.

Procedure: Clear the LOF Condition on the DS3XM-6 or DS-3E Cards in C-bit Format

Step 1 Verify that the line framing and line coding match between the DS3XM-6 port and the signal source.

a. In CTC, note the slot and port reporting the alarm.

b. Find the coding and framing formats of the signal source for the card reporting the alarm. Your

network administrator has this information.

c. Display the card-level view of the reporting card.

d. Click the Provisioning > Line tabs.