Configuring Directory Number
Trusted Relay Point for Calls
The Cisco Unified Communications Manager enables the insertion of trusted relay points (TRPs). The insertion of TRPs into the media path is most often used in a network virtualization environment and when QoS enforcement is needed. In the Cisco Virtual Expert Management solution, the TRP is used to reroute the media stream from the call endpoints and force them to flow through the TRP. On the switch port where the TRP connects a SPAN session is created to mirror all traffic to the NICE recording server. This is a cost-effective way to implement a centralized recording solution for non-encrypted audio calls on devices that do not support duplicate audio streams (e.g., Cisco 7985, 7960, etc) like the newer Cisco 7975 phones. With proper decode codec support on the recording server, even TelePresence calls can be recorded. A TRP can be configured on Cisco ISR routers with Voice IOS software. A typical TRP configuration in IOS would look as follows:
! sccp local FastEthernet0/0 sccp ccm 192.168.45.182 identifier 1 version 7.0 sccp ! sccp ccm group 1 associate ccm 1 priority 1 associate profile 1 register MTP-01 ! dspfarm profile 1 mtp codec g711ulaw codec pass-through maximum sessions software 110 associate application SCCP !
Once the TRP is configured, a Media Termination Point (MTP) is added to the CallManager under the Media resources menu. The MTP name must match the register name specified on the TRP. After the TRP is configured and registered, each phone can be configured to use the TRP individually or based on a device pool.
Cisco Virtual Expert Management for Financial Services Design and Implementation Guide