Music on Hold
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Contents |
Purpose
"Music on Hold" (MOH) is used in several places. The name originally comes from the music that is played when an extension put a caller on hold to avoid silence in the line. For more information, see for example http://en.wikipedia.org/wiki/Music_on_hold.
The PBX uses MOH when a call in being put on hold and when a caller is waiting in an agent group. There can be several sources for music on hold; these sources can be used in parallel and can be used in different locations. Because these sources are system-wide available, they are part of the administrator settings. The music on hold can be selected on domain level. See the domain mode for more information.
MOH Sources
Files
The PBX can use one or more files for MOH. These files are read by the PBX on demand and played in an endless loop mode.
The files must be in 8 kHz sampling frequency and they should be in 16 bit per sample signed format. The format must be mono WAV. You may also use other formats (u-law and GSM), but these formats will have less audio quality and require more CPU performance.
The files are loaded only once. However, you should be careful, because long files will be read into memory; long files can easily take a lot of memory. As a rule of thumb, every minute of the file will take about one MB of memory space.
Audio Input
This is a very convenient way to connect a CD, MP3 player or a radio to the PBX. The disadvantage of this method is that you can have only one external music source.
RTP Stream
Streaming RTP data becomes a popular way of providing music from external sources. Just like with a telephone conversation, the PBX receives the audio data in a standard RTP stream. There are several external tools available that are able to generate a compliant RTP stream. Because the PBX can have several RTP streams, you can use this method to generate different music on hold sources for the system.
The RTP stream must use G.711 encoding. There is no SIP signalling involved in this method and the PBX does not send any RTP data back.
Setup
In order to create a new MOH source, you must enter a name for the new source and select the type of the new source. If the type is "File", you need to specify the name of the file. Please contact Bizfon Support or your dealer to load the file onto your system.
For the type "RTP Stream" you must specify on which port the PBX should listen for RTP input (for example, "42000"). This port must be available on the system. If you change the setting, you might need to restart the PBX, so that the change takes effect.
For the type "Wave Input" there is no additional information required.
Editing
If you want to change a setting, you can just click on one of the links shown above the form. The PBX then will fill out the fields with the settings for the respective source. After making changes, you need to press the "Save" button. If you want to delete the source, click on the delete button. If you want to create a new source, you can use the clear button.
