AudioCodes Mediant 800B - Page 482

User's Manual 482 Document #: LTRT-10632
Mediant 800B Gateway & E-SBC
Tel Profile Parameter Global Parameter
PremiumServiceClassControlDiffServ.
Enable Early Media
early-media
[TelProfile_EnableEarlyMedia]
Enables the Early Media feature, which sends 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.
Note:
 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 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 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. The
parameter allows, for example, to interwork Alert with PI to
SIP 183 with SDP instead of 180 with SDP.
 You can also configure early SIP 183 response immediately
upon the receipt of an INVITE, using the EnableEarly183
parameter.
 Analog: To send a 183 response, you must also set the
ProgressIndicator2IP parameter to 1. If set to 0, a 180
Ringing response is sent.
 The corresponding global parameter is EnableEarlyMedia.
Progress Indicator to IP
prog-ind-to-ip
[TelProfile_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: