AudioCodes Mediant 800B User Manual page 1039

User's Manual
Parameter
PRACK Mode
prack-mode
[PrackMode]
Enable Early Media
early-media
[EnableEarlyMedia]
Enable Early 183
early-183
[EnableEarly183]
[IgnoreAlertAfterEarlyMedia]
Version 7.2
PS=207;OS=49680;;PR=314;OR=50240;PL=0;JI=600;LA=40
;
Supported: em,timer,replaces,path,resource-
priority
Allow:
REGISTER,OPTIONS,INVITE,ACK,CANCEL,BYE,NOTIFY,PRAC
K,REFER,INFO,SUBSCRIBE,UPDATE
User-Agent: Sip-Gateway-/v.7.20A.000.038
Reason: Q.850 ;cause=16 ;text="local"
Content-Length: 0
Determines the PRACK (Provisional Acknowledgment) mechanism
mode for SIP 1xx reliable responses.

[0] Disable

[1] Supported (default)

[2] Required
Note:

The Supported and Required headers contain the '100rel' tag.

The device sends PRACK messages if 180/183 responses are
received with '100rel' in the Supported or Required headers.
Global parameter enabling the Early Media feature for sending media
(e.g., ringing) before the call is established.
You can also configure this functionality per specific calls, using IP
Profiles (IpProfile_EnableEarlyMedia) or Tel
Profiles(TelProfile_EnableEarlyMedia). For a detailed description of
the parameter and for configuring the functionality, see 'Configuring IP
Profiles' on page 405 or Configuring Tel Profiles on page 439.
Note:

If the functionality is configured for a specific profile, the settings of
the global parameter is ignored for calls associated with the profile.

The parameter is applicable only to the Gateway application.
Global parameter that enables the device to send SIP 183 responses
with SDP to the IP upon receipt of INVITE messages. You can also
configure this functionality per specific calls, using IP Profiles
(IpProfile_EnableEarly183). For a detailed description of the parameter
and for configuring this functionality in the IP Profiles table, see
Configuring IP Profiles on page 405.
Note: If this functionality is configured for a specific IP Profile, the
settings of this global parameter is ignored for calls associated with the
IP Profile.
Determines the device's interworking of Alerting messages from ISDN
to SIP.

[0] = Disabled (default)

[1] = Enabled
When enabled, if the device sends a 183 response with an SDP (due
to a received ISDN Progress or Proceeding with PI messages) and an
Alerting message is then received from the Tel side (with or without
Progress Indicator), the device does not send an additional 18x
response, and the voice channel remains open. However, if the device
did not send a 183 with an SDP and it receives an Alert without PI, the
1039
67. Configuration Parameters Reference
Description
Mediant 800B Gateway & E-SBC