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Overview of Quantum Hot Standby
24
840 USE 106 00 January 2003
Fiber Optic Cable
Cable
Connections
The CHS 110 Hot Standby modules are connected by a fiber optic cable. The cable
has two identical strands. Each strand transmits a signal in only one direction. For
this reason, each strand must be connected between the upper (transmit) port on
one module and the lower (receive) port on the other.
If the cable is not connected properly, the Hot Standby modules are not able to
communicate and the Hot Standby system does not function. The Primary controller
operates without a backup. The Standby unit remains offline.
A 3 meter fiber optic cable is provided in the 140 CHS 210 00 Hot Standby kit. One
strand of that cable is marked with the manufacturer’s name. This is the only way to
distinguish the two strands.
This illustration shows CHS 110 Hot Standby modules connected by a fiber optic
cable.
Transmit
Receive
Transmit
Receive