For a multicarrier cabinet, set the emergency transfer switch to ON.
This locks the PN in the emergency transfer mode until the trouble is cleared.
Depending on which type of cabinet you are powering down, do one of the following:
In an AC-powered multicarrier cabinet, set the circuit breaker to OFF at the power-distribution unit.
In a DC-powered multicarrier cabinet, turn off the DC power supply.
In an AC- or DC-powered single-carrier cabinet stack, turn off the power for each affected carrier individually. The ON/OFF switch is located behind the:
AC carrier’s WP-91153 power unit
DC carrier’s 676B power unit
Power is restored by reversing the action taken above.
Restoring power will cause a restart. This process is described under EXP-PN in ABRI-POR (ASAI ISDN-BRI Port) in Avaya Aura® Communication Manager Alarms, Events, and Logs Reference.
If a powered-down carrier contains a 676B power unit, the 676B must have been powered down for at least 10 seconds for the unit to restart.
