supports telebub in full. Never switching is not recommended.
Midnight Switchovers
Because of the robustness of the new call processor architecture, the
need to perform CPU switchovers during midnight routines are no longer
required and have been removed from the software routine. With Call
Processor PII and Call Processor PIV, both CPUs are alive (although only
one is in call processing state).
It is still possible to have a daily switchover of the CPUs during the
midnight routine if so desired. The following steps are required to provision
this.
ATTENTION
IMPORTANT!
• If the customer can tolerate a service interruption of 6 to 10 seconds during
the daily diagnostic routines which are normally scheduled outside of
business hours (nominally “midnight”), and if the system is monitored daily or
in real time for critical alarms, then the daily scheduled switchover of active
CP side is recommended.
• If the customer cannot tolerate a daily scheduled diagnostic test, then a CP
side switchover test should be conducted during a scheduled maintenance
window at least once a year, and preferable monthly or quarterly.
• Never switching active CP side is not recommended, because a hardware
fault on the inactive standby CP side may not be discovered until the active
side experiences a hardware failure, a power failure, or a network connection
failure.
These recommendations apply to all dual processor machines.
Mato' Was'aka