Shared Trunk Facilities And Alternate Routing - NEC NEAX 2000 IPS Reference Manual

Chapter 14 Common Channel Inter-Office Signaling (CCIS)

Shared Trunk Facilities and Alternate Routing

Many network applications dictate a need to strategically distribute trunk facilities throughout
the network. The practice of sharing trunk facilities across a network is beneficial because it
reduces the overall network trunking requirements and provides additional lower cost route
choices. When combining this practice with the Alternate Routing capabilities of CCIS, a large
increase in network reliability and user productivity can be realized while reducing network
operations costs.
The flexibility surrounding CCIS allows multiple alternate routing schemes, which can be
created to enhance network reliability while they are specifically designed to consider Least
Cost Routing (LCR) benefits. This provides the user with multiple alternate routes that are
automatically selected with call costs as the primary factor in route selection. As shown in the
following diagram, CCIS intelligence will also automatically use the pre-configured alternate
route for the D channel (if configured for link redundancy) in the event that the primary D
channel route is disabled.
Alternate Routing
LINK FAILURE
VOICE/DATA
NETWORK
ALTERNATE ROUTE
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