Cisco Cisco Administrative Workstation Installation Guide

If pre-routing is to be performed, the ICM Enterprise Edition software requires 
access to the IntereXchange Carrier intelligent call routing network. Each 
interexchange carrier offers intelligent network services that allow 
customer-premises equipment to participate in network-level call routing. The 
ICM software connects to one or more networks by using a Cisco Network 
Interface Controller (NIC).

Specifically, this chapter helps you to complete the following tasks:

Choose your carrier(s). Cisco supports network interfaces to several 
carriers. You can use one or more carriers with the ICM software.

Choose the types of network link fault tolerance to apply. It is important 
to apply fault tolerance in the network interface and the links to the carrier’s 
intelligent network.

Order intelligent network service. Once you review the requirements for 
your specific Cisco NIC, order intelligent network service and work with the 
carrier and Cisco to bring the service on line.

The Network Interface Controller (NIC) is the interface between the ICM 
software and the IXC intelligent network. The NIC communicates with the IXC 
network by using network control links. These links are typically offered as part 
of the carrier’s intelligent network service.