Cisco 15310-MA Průvodce řešením problémů stáhnout pdf (Strana 149)

2-19

Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, Release 9.0

78-18394-01

Chapter 2 Alarm Troubleshooting

Safety Summary

The far-end failure alarm hierarchy is shown in Table 2-12, as given in Telcordia GR-253-CORE.

2.5.5 Service Effect

Service-Affecting (SA) alarms—those that interrupt service—could be Critical (CR), Major (MJ), or

Minor (MN) severity alarms. Service-Affecting (SA) alarms indicate service is affected.

Non-Service-Affecting (NSA) alarms always have a Minor (MN) default severity.

2.5.6 States

The State column on the Alarms or History tabs indicates the disposition of the alarm or condition as

follows:

• A raised (R) event is one that is active.

• A cleared (C) event is one that is no longer active.

• A transient (T) event is one that is automatically raised and cleared in CTC during system changes

such as user login, logout, loss of connection to node view, etc. Transient events do not require user

action. These are listed in Chapter 3, “Transient Conditions.”

2.6 Safety Summary

This section provides safety considerations designed to ensure safe operation of the ONS 15310-CL and

ONS 15310-MA. Do not perform any procedures in this chapter unless you understand all safety

precautions, practices, and warnings for the system equipment. Some troubleshooting procedures

require installation or removal of cards; in these instances pay close attention to the following cautions

and warnings.

—PLM-V

Lowest DS-N AIS (if reported for

outgoing DS-N signals)

1. Although it is not defined as a defect or failure, all-ones STS pointer relay is also

higher priority than LOP-P. Similarly, all-ones VT pointer relay is higher priority

than LOP-V.

2. LOP-P is also higher priority than the far-end failure RFI-P, which does not affect

the detection of any near-end failures. Similarly, LOP-V is higher priority than

RFI-V.

Table 2-11 Near-End Alarm Hierarchy

Priority Condition Type

Table 2-12 Far-End Alarm Hierarchy

Priority Condition Type

Highest RFI-L

—RFI-P

Lowest RFI-V

1 2 ... 144 145 146 147 148 149 150 151 152 153 154 ... 379 380

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