Service Processor Procedures In Service Mode - IBM 265 Service Manual

If the device driver is installed and surveillance enabled, the service processor
monitors the system heartbeat. If the heartbeat times out, the service processor
places an outgoing call. This is different from the bring-up phase scenario where two
reboot attempts are made before placing an outgoing call.

Service Processor Procedures in Service Mode

When the system is in service mode, the following service processor parameters are
suspended:
v Unattended start mode
v Reboot/restart policy
v Call-Out
v Surveillance
When service mode is exited, the service processor parameters revert to the customer
settings.
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Service Guide