AudioCodes Mediant 500L MSBR

User's Manual 22. Coders and Profiles
Version 6.8 339 Mediant 500L MSBR
Parameter Description
session progress response is sent.
Notes:
 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 this 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.
Web: Early Media
CLI: early-media
[IpProfile_EnableEarlyMedia]
Enables the Early Media feature for sending media (e.g.,
ringing) before the call is established.
 [0] Disable (default)
 [1] Enable

Digital: The device sends a SIP 18x response with
SDP, allowing the media stream to be established
before the call is answered.

Analog: The device sends a SIP 183 Session
Progress response with SDP instead of a 180
Ringing, allowing the media stream to be established
before the call is answered.
Notes:
 Digital: The inclusion of the SDP in the 18x response
depends on the ISDN Progress Indicator (PI). The SDP is
sent only if PI is set to 1 or 8 in the received Proceeding,
Alerting, or Progress PRI messages. See also the
ProgressIndicator2IP parameter, which if set to 1 or 8, the
device behaves as if it received the ISDN messages with
the PI.

CAS: See the ProgressIndicator2IP parameter.

ISDN: Sending a 183 response depends on the ISDN
PI. It is sent only if PI is set to 1 or 8 in the received
Proceeding or Alerting PRI messages. Sending 183
response also depends on the
ReleaseIP2ISDNCallOnProgressWithCause
parameter, which must be set to any value other than
2.
 See also the IgnoreAlertAfterEarlyMedia parameter. This
parameter allows, for example, to interwork Alert with PI