Cisco CP-7911G-CH1 Administration Guide - Page 284
Codecs, Port Numbers, and IP Addresses, Cisco Unified, ateway
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Appendix B: Integrating Cisco Unified Communications Manager and Cisco Unified SRST to Use Cisco Unified SRST Information About Using Cisco Unified SRST Gateways as a Multicast MOH Resource Figure 1 Multicast MOH from Cisco Unified SRST Flash Memory Cisco Unified SRST gateway V Cisco Unified Communications Manager WAN Multicast MOH 239.1.1.1 port 16384. Cisco Unified SRST gateway V Cisco Unified SRST gateway Flash packets audio 239.1.1.1 port 16384 Cisco Unified SRST gateway V Codecs, Port Numbers, and IP Addresses Cisco Unified SRST multicast MOH supports G.711 only. Figure 2 shows an example in which G.711 is the only codec used by a central Cisco Unified CM and three branches. In some cases, a Cisco Unified CM system may use additional codecs. For example, for bandwidth savings, Cisco Unified CM may use G.711 for multicast MOH and G.729 for phone conversations. As shown in the example in Figure 2, IP address 10.1.1.1 and port 1000 are used during phone conversations when G.729 is in use, and IP address 239.1.1.1 and port 16384 are used when a call is placed on hold and G.711 is in use. 116827 284 Cisco Unified SCCP and SIP SRST System Administrator Guide OL-13143-04
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