1152700• Issue 1 • February 2001 • Section 2 Operations and Maintenance
Page 15 of 23
Table 4-1. Alarm Identifications, continued
| ALARM |
| SEVERITY |
| IMPACT |
| MESSAGE |
|
|
|
|
|
|
|
|
DESCRIPTION | SUGGESTED COURSE OF ACTION |
Primary
Derived
DS1 Source
Failed
Protection
Switch Bytes
Failure
ProtectionSwi tchBytesFailu re
Protection
Switch
Failure
ProtSwitchF ailed
Protection
Switch
Successful
ProtSwitchS uccessful
Protocol
Error
Threshold
Crossing
Alert
ProtocolErro rTca
Remote
Failure
Indication
RFI
Major | Not Service |
| Affecting |
|
|
Minor | Installation |
| Error |
|
|
Minor – | Installation |
currently an | Error |
information |
|
al alert. |
|
|
|
Information | Not Service |
al | Affecting |
|
|
Information | Service |
al Alert | Degradation |
|
|
Major | Service |
| affecting |
|
|
The reference source for the primary clock has failed.
Inconsistent APS byte or invalid code.
User initiated or automatic protection switch failed.
Protection switch completed successfully.
Protocol error threshold has been crossed.
Far end has detected AIS at the DSX level.
Check source (external, optical in, or other AIC card) for alarms and correct as necessary.
Automatic Protection Switch (APS) byte is inconsistent with the expected code. Check facility interconnections and verify switching modes match at each end (i.e., 1:1, 1+1, 1:N).
Check protection group for previously failed/switched working card, lockout of protect, or failed protect card. PEIM must be installed at the rear of the shelf at the protection slot for 1:N protection groups.
User initiated or automatic protection switch was completed. No action necessary.
Caused by the following: 1) Out of range VPI/VCI, (2) Invalid PTI values (6 and 7), and 3) Unassigned VPI/VCI values. Check the connection VPI/VCI to make sure the provisioning is correct for the expected traffic stream..
RFI is a near end notification of a remote failure. For example, a LOS occurs at the near end, a RFI line and path is sent in the reverse direction to the remote node. An RFI line is sent if the network element is a line terminating element while a RFI path is sent if the netork element is a path terminating element.
(continued)
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© 2000, ADC Telecommunications, Inc.
