Connecting CS 1000E system components Page 105 of 488
Communication Server 1000E Installation and Configuration
To separate the redundant Call Servers, the ELAN subnet and the subnet of
the High Speed Pipe (HSP) can be extended between the two processors with
an Ethernet switch, using Layer 2 protocol.
If the two Call Servers are collocated, they can be connected using a standard
CAT5e or CAT6 crossover cable, limited to 100 meters in length.
For detailed information on Campus Redundancy, refer to Communication
Server 1000: System Redundancy (553-3001-307).
The Layer 2 switch allows the ELAN subnet and the subnet of the High Speed
Pipe (HSP) to be extended between the two processors. The
BayStack 470-24T provides full duplex wire-speed 100BaseT with no
significant packet loss (less than 0.001%) and delays of less than 100 usec.
The method used to connect Call Server 0 to Call Server 1 depends on the
proximity of the units. If the units are co-located, follow Procedure 12 to
connect the Call Servers. If the units are configured for Campus Redundancy,
follow Procedure 13 to connect the Call Servers.
Connecting co-located Call Servers
Follow Procedure 12 to connect co-located Call Servers.
Procedure 12
Connecting co-located Call Servers
1 Plug one end of the CAT5E RJ-45 crossover cable (NTRC17) into the
LAN 2 connector on the front of Call Server 0.
2 Plug the other end of the CAT5E RJ-45 NTRC17 crossover cable into the
LAN 2 connector on the front of Call Server 1.
End of Procedure
Connecting Campus Redundant Call Servers
The MultiLink Trunking (MLT) feature of the BayStack 470-24T enables the
two uplink fiber ports to be grouped but is not solely necessary for the two
uplink fiber ports to be linked. Grouping the uplink fiber ports increases
aggregate throughput up to 2 Gbps between sides with active redundant links.
