Quintum Technologies Call Routing Server - Manual (Page 6)

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Chapter 1: Overview
Features
System benefits
Designed for medium to large scale converged network deployments, the Call Routing Server lowers operat-
ing costs, and increases profits. It supports real-time minimization of termination costs on a call by call basis
and ensures lowest cost call transport while meeting service level agreements.
Routing endpoints may be both ingress and egress endpoints and may be both gateways and gatekeepers; the
centralized routing and management interface allows quick routing changes throughout the network without
individual gateway modifications.
Scalable design
The scalable design allows for the management of mid to large networks. Multiple Call Routing Servers may
be distributed within the voice network for even greater capacity and redundancy. Routing modifications are
immediately reflected throughout the entire voice network without the need for routing modification on indi-
vidual gateways.
Flexible Routing/Least Cost Routing
The Call Routing server performs dynamic routing to gateway or trunk group level. There are different types
of routing, such as:
• Least Cost Routing (LCR)
• Route Quality. Selects route based on monitored round trip delay and packet loss.
• Answer Seizure Ratio. Selects route based on route quality history (ASR).
• Circuit Routing. Selects route based on best available trunk group (i.e., trunk group on same switch).
• Domain Priority. Selects route to specified carrier trunk group based on ingress number.
• Best Pattern Match. Selects route based on greatest number of dialed digits matched.
• Load Balancing. Automatically selects route to balance load between available trunk groups.
Least Cost Routing (LCR) functionality ensures the lowest cost call transport, while still meeting service level
agreements. The Call Routing Server connects incoming calls to available carriers at the lowest available cost,
by routing calls between IP endpoints or between individual DS0 circuit trunks. The Call Routing Server
employs many methods to achieve Least Cost Routing, including a full route selection in which to base calls,
as well as a database of service provider partner data and simplified routing modifications. Any service pro-
vider termination rate modifications have immediate impact on call route selection throughout your network.
Ingress/Egress capability
Ingress endpoints are devices through which voice traffic enters a given voice network; egress endpoints are
devices through which voice traffic leaves a given voice network.
Egress trunk groups can be logically grouped for routing purposes; an egress group may represent one or more
egress trunk groups. Egress groups may be used for various purposes, but are typically created to logically
separate egress points within the voice network.
Ingress trunk groups and subscribers may be assigned to ingress groups which indicate the criteria used to
route calls. One or more ingress groups may exist in the Routing Server; each group may be configured to
route calls according to a different criteria.