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Cisco Unified Communication Manager (Unified CM) 8.0(1) now includes a new Routing Rules interface, which enables an adjunct route server to make call-routing decisions. Once enabled, Cisco Unified CM issues a route request that contains the calling and called party information to the route server. The route server receives the request, applies appropriate business logic, and returns a route response that instructs Cisco Unified CM how the call should be routed, along with any additional call treatment that should be applied.

The route server can instruct Cisco Unified CM to allow, divert, or deny the call, modify calling and called party information, play announcements to callers, reset call history so voicemail and IVR servers can properly interpret calling/called party information, and log reason codes that indicate why calls were diverted or denied. The following examples show how external call control can work:

• Best Quality Voice Routing - The adjunct route server monitors network link availability, bandwidth usage, latency, jitter, and MOS scores to ensure calls are routed through voice gateways that deliver the best voice quality to all call participants.


• Least Cost Routing - The adjunct route server is configured with carrier contract information such as Lata and Inter-Lata rate plans, trunking costs, and burst utilization costs to ensure calls are routed over the most cost effective links.


• Ethical Wall - The adjunct route server is configured with corporate policies that determine reachability (e.g. Is user 1 allowed to call user 2?). When Cisco Unified Communications Manager issues a route request, the route server sends a response that indicates whether the call should be allowed, denied, or redirected to another party.


• Blocked Call List - The abjunct route server is configured with a list of phone numbers which should be blocked. When Cisco Unified CM issues a route request, the route server denies the call and instructs Unified CM to play an announcement.

Instructions:
For more information on the Cisco Unified Routing Rules interface, refer to the Getting Started section

For information on how to configure external call control in Cisco Unified Communications Manager Administration, refer to the "External Call Control" chapter in the Cisco Unified Communications Manager Features and Services Guide for Release 8.0(1) at http://www.cisco.com/en/US/products/sw/voicesw/ps556/prod_maintenance_guides_list.htm.