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Note that redundancy will be unavailable while the configuration is not synchronized. If
the active APEX fails during synchronization, the standby APEX will become active. The
configuration may be out of sync, so you may have to re-apply the configuration. (The
standby APEX will not be able to apply most configuration parameters, including OTS,
QAM, and routing configuration; this configuration is synchronized from the active
APEX.)
IMPORTANT:
1. The QAM modules must be the same type (2x4 or 2x8) in both the primary and
secondary APEXs.
2. The same GigE ports must be enabled on the primary and secondary APEXs.
3. The primary and secondary APEXs must have unique IP addresses.
CAUTION
The GigE configuration does not automatically synchronize between the Primary and
Secondary APEXs. Make certain that the same GigE ports are enabled on both primary
and secondary units.
Removing QAM Modules from the APEX in Chassis Redundancy
QAM Modules cannot be removed from an APEX that is enabled for Chassis
Redundancy, because this creates a QAM Module mismatch and causes RF to mute on
both APEXs of the redundant pair.
IMPORTANT:
1. Chassis Redundancy must be disabled before removing a QAM Module from the
APEX
2. A Primary or Secondary APEX with an Active APEX Status cannot have Chassis
Redundancy disabled without first disabling Program Mappings
3. An APEX with a Standby APEX Status can have Chassis Redundancy disabled (the
APEX automatically disables Program Mappings)
CAUTION
Removing QAM Modules from an APEX enabled for Chassis Redundancy causes RF to
mute on both APEXs of the redundant pair.
To replace a QAM Module in an APEX (that is part of a Chassis Redundancy pair) without
interrupting service to the downstream plant, perform the following steps:
1. Verify the
2. If the APEX Status is Standby, proceed to step 4.
3. If the APEX Status is Active, open the
Force Failover on the other APEX in the pair.
Note: Make certain that the APEX from which a QAM Module is to be removed is
the Standby APEX.
Configuration • Chassis Redundancy Configuration
APEX1000 All-Purpose Edge QAM Software Version 2.4.x • Installation and Operation Manual
573408-001-a
APEX Status
for the APEX from which a QAM Module is to be removed.
QAM RF Redundancy
B
window, and apply
85
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