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
290
Cisco Unified SCCP and SIP SRST System Administrator Guide
OL-13143-04
Tip
The simplest way to create an audio source is to use the default audio source.
Whether you use a default Cisco Unified CM MOH audio source or you create one, the MOH audio
source must be configured for multicasting in the MOH Audio Source Configuration window.
Note that the MOH Audio Source File Status section shows that the MOH audio source file is configured
for four codec formats. If you are planning to use several codecs, ensure that the audio source file
accommodates them.
For further information about the creation of an MOH audio source, see the
Cisco Unified
Communications Manager Administration Guide.
From the
Cisco Unified
Communications Manager
documentation directory, click
Maintain and Operate Guides
and select the
required Cisco Unified CM version.
Use this procedure to configure the MOH audio source to enable multicasting and continuous play.
Note
These instructions assume that an MOH audio source file was already created.
Step 1
To enable multicast MOH for the MOH audio source, choose
Service
>
Media Resources
>
Music On
Hold Audio Source
to display the MOH Audio Source Configuration window.
Step 2
Double-click the required audio source listed in the MOH Audio Sources column.
Step 3
In the MOH Audio Source Configuration window, check
Allow Multicasting
.
Step 4
Click
Update
.
Enabling Multicast on the Cisco Unified Communications Manager MOH Server and Configuring
Port Numbers and IP Addresses
Enter a base multicast IP address and port number in the Multicast Audio Source Information section of
the MOH Server Configuration window. If you are using Cisco Unified CM multicast MOH and
Cisco Unified SRST multicast MOH (see the
“Codecs, Port Numbers, and IP Addresses” section on
page 284
and the
“Multicast MOH Transmission” section on page 286
), you must select a port and IP
address increment method to configure for two sets of port numbers and IP address.
If the Increment Multicast on radio button is set to IP address, each MOH audio source and codec
combination is multicast to different IP addresses but uses the same port number. If it is set to Port
Number, each MOH audio source and codec combination is multicast to the same IP address but uses
different destination port numbers.
Table 2
shows the difference between incrementing on an IP address and incrementing on a port number,
using the base IP address of 239.1.1.1 and the base port number of 16384. The table also matches
Cisco Unified Communications Manager audio sources and codecs to IP addresses and port numbers.
