Codecs, Port Numbers, And Ip Addresses - Cisco CP-7911G-CH1 System Administrator Manual

Information About Using Cisco Unified SRST Gateways as a Multicast MOH Resource
Figure 1
Cisco Unified
Communications Manager

Codecs, Port Numbers, and IP Addresses

Cisco Unified SRST multicast MOH supports G.711 only.
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
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.
Cisco Unified SCCP and SIP SRST System Administrator Guide
284
Appendix B: Integrating Cisco Unified Communications Manager and Cisco Unified SRST to Use Cisco Unified SRST
Multicast MOH from Cisco Unified SRST Flash Memory
WAN
Multicast MOH
239.1.1.1 port 16384.
Figure
Cisco Unified
SRST gateway
V
Cisco Unified
SRST gateway
V
Cisco Unified
SRST gateway
V
Figure 2
2, IP address 10.1.1.1 and port 1000 are used during phone
Cisco Unified
SRST gateway
Flash
packets
audio
shows an example in which G.711
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