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2. CPX-1000 Voice Services Platform Description 1000-A2-GN22-00
2-16 February 2003
This architecture enables two types of CP module switchovers:
Automatic switchover—the system detects a problem
with the active CP module and performs a forced
switchover to the standby CP module. Mechanisms used to
detect problems with a CP module include:
— Loss of a CP-to-MP (Management Processor) module
heartbeat
— Loss of a CP-to-CP module heartbeat
— Failure of a CP to respond to an “are you alive” ping
request from the High Availability software
— Failure of the High Availability software to detect a ping
request from the ping component on a CP module
Administrative switchover—the network administrator
initiates a CP switchover using JetCraft or JetVision. A
forced switchover always goes through regardless of voice
traffic and active cells remain up.
Upon initiating a switchover, the previously active CP’s calls are
assumed by the new active CP. After the switchover, the old active
CP assumes the standby role (if all is well). CP switchovers do not
automatically revert back.
Voice/Data Interruptionœ – possible
Calls that are in setup process are lost during a forced
switchover. Calls that are already established and carrying
voice traffic continue during a switchover.