Cisco CP-7911G-CH1 Administration Guide - Page 306

Appendix B: Integrating Cisco Unified Communications Manager and Cisco Unified SRST to Use Cisco Unified SRST How to Use Cisco Unified SRST Gateways as a Multicast MOH Resource Verifying Cisco Unified SRST Multicast MOH to IP Phones To verify that Cisco Unified CM is signaling the IP phone to receive Cisco Unified SRST multicast MOH correctly, perform the following steps. Step 1 Step 2 Verify that an IP phone caller hears MOH when placed on hold by an IP phone caller. Use an IP phone to call a second IP phone, and put the second caller on hold. The second caller should hear MOH. Check the MOHMulticastResourceActive and MOHUnicastResourceActive counters. Use the Performance window to check the MOHMulticastResourceActive and MOHUnicastResourceActive counters under the Cisco MOH Device performance object. See Step 2 in the "Verifying Cisco Unified Communications Manager Multicast MOH" section on page 296. For Cisco Unified SRST multicasting MOH to work, the multicast counter must increment. Troubleshooting Tips If no MOH is heard and the Cisco Unified SRST MOH signaling is multicasting, connect a sniffer to the PC port on the back of IP phone. If the IP phone and Cisco Unified SRST gateway are connected to the same subnet, multicast RTP packets must be detected at all times, even when the IP phone was not placed on hold. If the IP phone and the Cisco Unified SRST gateway are not connected to the same subnet, multicast RTP packets are detected only when the IP phone is placed on hold and sends an Internet Group Management Protocol (IGMP) Join to the closest router. Configuring Cisco Unified SRST for MOH from a Live Feed The following sections describe the configuration tasks for Cisco Unified SRST MOH live feed: • Prerequisites, page 307 • Restrictions, page 307 • Setting Up the Voice Port on the Cisco Unified SRST Gateway, page 307 • Setting Up the Directory Numbers on the Cisco Unified SRST Gateway, page 309 • Establishing the MOH Feed, page 309 • Verifying Cisco Unified SRST MOH Live Feed, page 311 To configure MOH from a live feed, establish a voice port and dial peer for the call and then create a "dummy" phone or directory number. The dummy number allows for making and receiving calls, and the number is not assigned to a physical phone. It is that number that the MOH system autodials to establish the MOH feed. The moh-live command allocates one of the virtual voice ports from the pool of virtual voice ports created by the max-dn command. The virtual voice port places an outgoing call to the dummy number; that is, the directory number specified in the moh-live command. The audio stream obtained from the MOH call provides the music-on-hold audio stream. We recommend that the interface for live-feed MOH is an analog E&M port because it requires the minimum number of external components. Connect a line-level audio feed (standard audio jack) directly to pins 3 and 6 of an E&M RJ-45 connector. The E&M WAN interface card (WIC) has a built-in audio transformer that provides appropriate electrical isolation for the external audio source. (An audio 306 Cisco Unified SCCP and SIP SRST System Administrator Guide OL-13143-04