Cisco Systems OL-11591-01 manual Video Deployment with Rsvp, 12-21

Chapter 12 IP Video Telephony Configuration

Cisco Unified CallManager Configuration for IP Video Telephony

Region A – SJC Cisco Unified CallManager – Region B – Transcoder – Region C – Intercluster trunk – Region D – transcoder – Region E – DFW Cisco Unified CallManager – Region F

The regions include the following devices:

•Region A (SJC-Video)—All video enabled phones, including Cisco Unified Video Advantage

•Region B (SJC-Local)—All devices without video capabilities

•Region C (SJC-WAN)—All intercluster trunks

•Region D (DFW-WAN)—All intercluster trunks

•Region E (DFW-Local)—All devices without video capabilities

•Region F (DFW-Video)—All video enabled phones, including Cisco Unified Video Advantage Table 12-24shows the regions matrix for SJC.

Table 12-24	SJC Regions Matrix
		Region A	Region B	Region C
Region A		G.711/384	G.711/384	G.711/384
Region B		G.711/384	G.711/384	G.729/384
Region C		G.711/384	G.729/384	G.729/384

Table 12-25shows the regions matrix for DFW.

Table 12-25	DFW Regions Matrix
		Region D	Region E	Region F
Region D		G.729/384	G.729/384	G.711/384
Region E		G.729/384	G.711/384	G.711/384
Region F		G.711/384	G.711/384	G.711/384

If the H.323 video endpoint in SJC called directly to an H.323 video endpoint in DFW, a transcoder would not be invoked and video would be available for the call. However, in this scenario, a transcoder is invoked before the call is transferred. Therefore, video is not available after the call transferred.

Note This transfer scenario applies to all calls transferred via Cisco Unity Automated Attendant and via Cisco IPCC Express.

Video Deployment with RSVP

You can use Cisco RSVP Agent to control video bandwidth. Such a deployment could be use in a situation where an audio device can use only G.711 and audio transcoding is necessary.

Cisco RSVP Agent is an IOS-based RSVP proxy with an SCCP interface and is the only method for performing audio transforming of a video call. Cisco RSVP Agent registers to Cisco Unified CallManager through SCCP as an MTP or transcoder. Video endpoints do not need to support RSVP, but they do need to be allocated a media resource group that contains a Cisco RSVP agent. When RSVP or audio transcoding is required, Cisco Unified CallManager inserts a Cisco RSVP Agent in the call to perform RSVP reservation or transcoding.

	System Test Architecture Reference Manual for IP Telephony
OL-11591-01		12-21