AudioCodes Mediant 500 MSBR, User Manual

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Version 7.2 433 Mediant 500 MSBR
User's Manual 23. Coders and Profiles
Parameter Description
progress response is sent.
Note:


To enable the device to send a 183/180+SDP responses, set
the EnableEarlyMedia parameter to 1.

If the EnableDigitDelivery parameter is set to 1, the device
doesn't play a ringback tone to IP and doesn't send 183 or
180+SDP responses.

Digital interfaces: If the parameter is enabled and
EnableEarlyMedia is set to 1, the device plays a ringback
tone according to the following:

CAS: The device opens a voice channel, sends a
183+SDP response, and then plays a ringback tone to IP.

ISDN: If a Progress or an Alerting message with PI (1 or
8) is received from the ISDN, the device opens a voice
channel, sends a 183+SDP or 180+SDP response, but
doesn't play a ringback tone to IP. If PI (1 or 8) is
received from the ISDN, the device assumes that
ringback tone is played by the ISDN switch; otherwise,
the device plays a ringback tone to IP after receiving an
Alerting message from the ISDN. It sends a 180+SDP
response, signaling to the calling party to open a voice
channel to hear the played ringback tone.

The corresponding global parameter is PlayRBTone2IP.
Progress Indicator to IP
prog-ind-to-ip
[IpProfile_ProgressIndicator2IP]
Defines the progress indicator (PI) sent to the IP.

[-1] = (Default) Not configured:

Analog: Default values are used (1 for FXO interfaces
and 0 for FXS interfaces).

Digital ISDN: The PI received in ISDN Proceeding,
Progress, and Alerting messages is used, as described in
the options below.

[0] No PI =

Analog: For IP-to-Tel calls, the device sends a 180
Ringing response to IP after placing a call to a phone
(FXS) or PBX (FXO).

Digital: For IP-to-Tel calls, the device sends 180 Ringing
response to the IP after receiving an ISDN Alerting or (for
CAS) after placing a call to the PBX/PSTN.

[1] PI = 1:

Analog: For IP-to-Tel calls, if the EnableEarlyMedia
parameter is set to 1, the device sends a 183 Session
Progress message with SDP immediately after a call is
placed to a phone/PBX. This is used to cut-through the
voice path before the remote party answers the call. This
allows the originating party to listen to network call
progress tones such as ringback tone or other network
announcements.

Digital: For IP-to-Tel calls, if the parameter
EnableEarlyMedia is set to 1, the device sends 180
Ringing with SDP in response to an ISDN Alerting or it
sends a 183 Session Progress message with SDP in
response to only the first received ISDN Proceeding or