Processing of transient TF alarms on WDM equipment

The processing rules are as follows:
1. If the TF alarm is reported by TC1 or TC2, directly replace the board no matter whether the alarm is reported transiently or persistently.
2. For 71SC1/71SC2:
a. If the TF alarm is transiently reported, upgrade the board software to 1.12 or a later version.
b. If the TF alarm persists for 5s or longer, or the alarm is still transiently reported after the board software upgrade, replace the board. Most transient TF alarms can be avoided by software upgrades.
3. E1SC1/SC2:
a. If the TF alarm is transiently reported, upgrade the board software to 1.27 or a later version. For versions earlier than 1.27, the workarounds are not complete therefore the board software upgrade cannot avoid this alarm.
b. If the TF alarm persists for 5s or longer, or the alarm is still transiently reported after the board software upgrade, replace the board. Most transient TF alarms can be avoided by software upgrades.

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