Configuring Moh From External Audio Source - AudioCodes Mediant 800 User Manual

CHAPTER 28 Configuring Supplementary Services
For analog interfaces:
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Configuring MoH from External Audio Source

The device's Gateway application (FXS interfaces) can play Music on Hold (MoH) audio originating
from an external, third- party media (audio) player, to call parties that are placed on hold.
Implementing an external media source offers flexibility in the type of audio that you want played as
MoH (e.g., radio, adverts, or music). If you are not using an external media source, the device plays
its' local default hold tone or a hold tone from an installed PRT file (depending on your
configuration). The device can forward this audio stream to any external IP-based system (for
example, a softswitch, media gateway or SBC) or use it for SBC calls that it processes (applicable
only to the SBC application). Thus, the device functions like an IP media server (audio streamer),
except that the actual source of the media is from an external player.
The external media source is connected to the device's FXS port through a telephone adapter (for
FXS emulation). The FXS port is always in off-hook state, continuously receiving media streams
from the external media source. When the device receives a SIP INVITE for this port (IP-to-Tel
call), it responds with a SIP 200 OK and forwards the audio stream to the sender of the INVITE.
Up to two FXS ports can be used for this feature, where each port can play media to up to 20
concurrent call sessions. In addition, each FXS port can play a specific media for MoH. For
example, one port can play music while the other port can play advertising messages.
The following figure provides an example of this feature where each FXS port receives different
audio from the external audio player, which the device forwards as music-on-hold to an external call
processing system. The device determines which audio to play based on the phone number
(destination) of the held call party.
If a party that is placed on hold (e.g., B in the above example) is called by another
party (e.g., D), then the on-hold party receives a call waiting tone instead of the held
tone.
While in a Double Hold state, placing the phone on-hook disconnects both calls
(i.e. call transfer is not performed).
You can enable the device to handle incoming re-INVITE messages with
"a=sendonly" in the SDP, in the same way as if "a=inactive" is received in the
SDP. This is configured using the SIPHoldBehavior parameter. When enabled, the
device plays a held tone to the Tel phone and responds with a 200 OK containing
"a=recvonly" in the SDP.
Mediant 800 Gateway & E-SBC | User's Manual
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