Information Technology Reference
In-Depth Information
An MoH server can be either a publisher/subscriber or dedicated server within a CUCM cluster. MoH servers must register with
CUCM, and they communicate with CUCM using SCCP.
Note that each multicast MoH stream relies on a separate audio source and that each audio source can supply a stream for the four
codecs supported (G.711 mu-law, G.711 a-law, G.729, and wideband), giving the maximum number of multicast streams (204) from
the maximum number of audio sources (51). When deploying MoH, it is important to ensure that endpoints can receive the codecs
supported by the MoH server and that MoH streams using certain codecs are not inadvertently restricted because of the configuration
of CUCM locations or regions.
You can add audio source files (in a WAV format) to a MoH server by navigating to
Media Resources, Music on Hold Audio
Source Files
, and then clicking
Add New
, followed by
Upload File
.
You can configure a MoH server by navigating to
Media Resource, Music on Hold Server
, while MoH parameters, such as
supported codecs, can be specified within the Service Parameters configuration.
The MoH audio file that an endpoint placed on hold hears is determined by the User Hold MoH Audio Source file of the device
placing the call on hold, but the audio stream corresponding to that file is sourced from the MRGL resource or server of the endpoint
placed on hold.
Conferencing: Audio and Video
Conference bridges are software or hardware resources that allow the participation of multiple parties in a call.
CUCM can allocate registered software and hardware conference bridges when a conference is invoked by endpoints. Cisco audio
conference bridges and certain IP/VC 3500 videoconference bridge models can communicate with CUCM using SCCP.
It is important to ensure that conference bridges are correctly specified in the appropriate MRG/MRGL so that they can be allocated
as required by endpoints.
Hardware and software conference bridges can support ad-hoc conferences and MeetMe conferences. Ad-hoc conferences are those
in which a user (the conference controller) calls other participants and adds them to the conference by pressing the Confrn softkey or
pressing the Select softkey followed by the Join softkey on his Cisco IP phone.
