Hot Standby Sync-Link

Cable Connections

The copros in the Primary and Standby CPUs must be connected by a crossed fiber optic cable plugged into the HSBY Link socket:

If the cable is not connected, the Quantum Hot Standby processors cannot communicate, and the Hot Standby system cannot function.

The fiber optic cables are sold separately:

Multi mode Models for 140 CPU 67• 60	Description
490NOR00003	3 m MTRJ/MTRJ
490NOR00005	5 m MTRJ/MTRJ
490NOR00015	15 m MTRJ/MTRJ
Single mode Models for 140 CPU 67• 61
VDIF0646463505	5 m LC DUPLEX / LC DUPLEX - Simple CPU to CPU connection
VDIF0646463505	5 m SC DUPLEX / LC DUPLEX - PC to CPU connection1
1. For firmware upgrade for example. This requires an additional switch: 499NSS25101 (not managed) or TCSESM043F1CS0 (managed).

The fiber connection between Primary CPU and Standby CPU must be a direct cable connection.

NOTE: Refer to the recommendations for fiber optic cable use.

WARNING

UNEXPECTED EQUIPMENT OPERATION

Do not use hubs and switches as part of the fiber optic link.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Interrupted Sync-Link

If there is break in the communication over the sync-link cable:

The Primary CPU detects the break and remains the Primary CPU.
The Standby CPU requests the Standby CRP if the Primary CPU exists.
The standby CPU acknowledges that it cannot communicate with the primary CPU and goes into the Offline mode.

Connecting Two Backplanes

The Primary CPU and Standby CPU backplanes may be placed as far as:

If the modules are more than 15 km apart, a fiber cable is required:

62.5/125 micrometer multi mode fiber cable with MTRJ for the 140 CPU 67• 60
9/125 micrometer single mode fiber cable with LC type connector for the 140 CPU 67• 61