This document describes how to deploy and configure the trunk utilization feature with CVP.
Cisco recommends that you have knowledge of these topics:
This document is not restricted to specific software and hardware versions.
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, ensure that you understand the potential impact of any command.
Trunk Utilization Feature Overview
Through the Trunk Utilization feature, a gateway is used for real-time Unified CVP routing and Unified Intelligent Contact Management (ICM) reporting and scripting. A gateway pushes the status of memory, Digital Signal 0 (DS0), Digital Signal Processor (DSP), and Central Processing Unit (CPU) to Unified CVP. Because this feature uses a push method to send resource data to Unified CVP, resources are monitored more closely and failover can occur faster when a device goes down or is out of resources.
This feature has the following characteristics:
• Each gateway can publish an Session Initiation Protocol (SIP) OPTIONS message with CPU, Memory, DS0, and DSP information to Unified CVP every three minutes when operation conditions are normal on the gateway
• The push interval is configurable through the Cisco IOS Command Line Interface (CLI) on the gateway
• If a high watermark level is reached, the gateway sends the SIP OPTIONS message immediately with an Out-Of-Service = true indication, and does not send another OPTIONS message until the low watermark level is reached with an Out-Of-Service = false indication
• You can set up to five Resource Availability Indication (RAI) targets on the gateway. You can also use Trunk Utilization Routing to update trunk group status in the Unified Contact Center Enterprise (CCE) router. A Public Switched Telephone Network (PSTN) call (through the ICM script) can query the router with a preroute from a Network Interface Controller (NIC) to use the available ingress gateway for the post route to Unified CVP
DS0 Trunk Information
Through Unified CVP, Unified ICM passes the gateway trunk and DS0 information from the arriving SIP call. PSTN gateway trunk and DS0 information received at ICM has the following purposes:
• Reporting • Routing in the Unified CCE Script Editor where TrunkGroupID and TrunkGroupChannelNum information is available for routing decisions
This message is used in the examples: The PSTN trunk group data comes from the PSTN Gateway in the SIP INVITE: