Whenever the media module resets, the packet facility is set on the a facility. If system software detects a problem with this facility, it switches the packet and control traffic to another facility. The busyout command is not allowed on the packet facility without override. When override is used, all packet and circuit traffic on the packet facility is switched to one of the other three facilities, and all traffic that was on the destination facility before the switch is dropped.
There is no way to tell which facility is carrying the packet and control traffic without attempting to busy it out. If there is only one facility left in service on the media module, it cannot be busied out. In this case, the media module must be busied out.
Caution:
Busying out a non-packet facility disrupts all traffic carried on that facility. Using override to busy the packet facility disrupts all traffic on the facility to which the packet and control traffic is moved. This facility cannot be determined in advance.
On critical-reliability systems (duplicated PNC) a facility on the active PNC cannot be busied out. Use busyout pnc to busyout a standby PNC, and then busyout a facility on the standby PNC.
