AudioCodes Mediant 1000B User Manual page 1065

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
REGISTER,OPTIONS,INVITE,ACK,CANCEL,BYE,NOTIFY,PRA
CK,REFER,INFO,SUBSCRIBE,UPDATE
User-Agent: Sip-Gateway-/v.7.20A.000.038
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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.

The parameter is applicable only to the Gateway application.
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 423
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 423.
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.
Defines the device's interworking of Alerting messages for IP-to-Tel
calls (ISDN). It determines whether the device sends a 180 Ringing
response to the caller after the device sends a 183 Session Progress
response to the caller. The 180 Ringing response indicates that the
INVITE has been received by the ISDN side and that alerting is taking
place (i.e., ISDN Progress message), indicating to the IP PBX to play
a ringback tone. The 183 Session Progress response allows an early
media session to be established prior to the call being answered, for
example, to hear a ring tone, busy tone or recorded announcement.

[0] = (Default) Disable. If the device sends a 183 response with
SDP (due to a received ISDN Progress or Proceeding with PI
messages, i.e., a ring tone, busy tone or recorded announcement
played to the ISDN side) and an Alerting message is then received
from the ISDN side (with or without Progress Indicator), the device
also sends a 180 Ringing response to the caller. Therefore, in this
1065
65. Configuration Parameters Reference
Description
or Configuring Tel Profiles on page 459.
Mediant 1000B Gateway & E-SBC