Lof (Ds3); Clear The Lof (Ds3) Alarm; Lof (Ec1) - Cisco ONS 15310-CL Troubleshooting Manual

1.7.133 LOF (DS3)

f.
g.
If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
Step 2
for more information or call Cisco TAC (1 800 553-2447) in order to report a Service-Affecting (SA)
problem.
1.7.133 LOF (DS3)
The DS-3 LOF alarm indicates that the receiving 15310-CL-CTX, DS1-28/DS3-EC1-3, or
DS1-84/DS3-EC1-3 port has lost frame delineation in the incoming DS-3 data stream. The framing of
the transmitting equipment could be set to a format that differs from the receiving system. On DS-3 ports,
the alarm occurs only on when the provisionable line type format set to C bit or M13.

Clear the LOF (DS3) Alarm

Step 1 Change the line type of the non-ONS equipment attached to the reporting port to C bit by completing the
following steps:
a.
b.
c.
d.
e.
Step 2 If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
for more information or call Cisco TAC (1 800 553-2447) in order to report a Service-Affecting (SA)
problem.

1.7.134 LOF (EC1)

Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
1-88
Verify that the reporting Line Coding matches the signal source line coding (AMI and AMI or B8ZS
and B8ZS). If the signal source line coding does not match the reporting port, click the Line Coding
cell and choose the correct type from the drop-down list.
Click Apply.
Note On the Line tab, the B8ZS coding field is normally paired with ESF in the Line Type field.
AMI coding is normally paired with SF (D4) in the Line Type field.
Default Severity: Critical (CR), Service-Affecting (SA)
SONET Logical Object: DS3
Double-click the 15310-CL-CTX, or DS1-28/DS3-EC1-3, or DS1-84/DS3-EC1-3 port to display the
card view.
Click the Provisioning > DS3 > Line tabs.
Verify that the line type of the reporting port matches the line type of the signal source.
If the signal source line type does not match the reporting port, click Line Type and choose C Bit
from the drop-down list.
Click Apply.
Default Severity: Critical (CR), Service-Affecting (SA)
SONET Logical Object: EC1
Chapter 1 Alarm Troubleshooting
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