Cisco CP-7911G-CH1 System Administrator Manual page 297

Appendix B: Integrating Cisco Unified Communications Manager and Cisco Unified SRST to Use Cisco Unified SRST
Prerequisites
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Enabling Multicast MOH on the Cisco Unified SRST Gateway
No multicast MOH routing configuration is required for Cisco Unified SRST gateways because each
Cisco Unified SRST gateway is configured to act as a host running an application that streams multicast
MOH packets from the network. The multicast moh command declares the Cisco Unified
Communications Manager multicast MOH address and port number and allows Cisco Unified SRST
gateways to route MOH from flash memory to up to four IP addresses. If no route IP addresses are
configured, the flash MOH is sent through the IP address configured in the Cisco Unified SRST 
ip source-address command.
SUMMARY STEPS
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OL-13143-04
The Cisco Unified SRST gateways must run Cisco IOS Release 12.2(15)ZJ2 or a later release.
The flash memory in each of the Cisco Unified SRST gateways must have an MOH audio file. The
MOH file can be in .wav or .au file format, but must contain 8-bit 8-kHz data, such as an a-law or
mu-law data format. A known working MOH audio file (music-on-hold.au) is included in the
program .zip files that can be downloaded from http://www.cisco.com/cgi-bin/tablebuild.pl/ip-key.
Or the music-on-hold.au file can be downloaded from
http://www.cisco.com/cgi-bin/tablebuild.pl/ip-iostsp
Cisco Unified SRST router.
For Cisco Unified CM versions 4.3 or earlier versions running on Windows, download MOH files
by copying one of the MOH files, such as SampleAudioSource.ULAW.wav, from C:\Program
Files\Cisco\MOH on Cisco Unified CM.
During the copying process, four files are added to each router's flash automatically. One of
Note
the files must use a mu-law format as indicated by the extension.ULAW.wav.
You must configure a loopback interface and include its IP addresses in the Cisco Unified SRST
multicast MOH configuration. This configuration allows multicast MOH to be heard on POTS ports
on the gateway. The loopback interface does not have to bind to either H.323 or MGCP.
Configure at least one ephone and directory number (DN), even if the gateway is not used for
Cisco Unified SRST. Cisco Unified SRST multicast MOH streaming never starts without an ephone
and directory number.
ccm-manager music-on-hold
interface loopback number
ip address ip-address mask
exit
interface fastethernet slot/port
ip address ip-address mask
exit
call-manager-fallback
ip source-address ip-address [port port]
max-ephones max-phones
How to Use Cisco Unified SRST Gateways as a Multicast MOH Resource
and copied to the flash memory on your
Cisco Unified SCCP and SIP SRST System Administrator Guide
297