AudioCodes Mediant 500L - Page 1070

User's Manual 1070 Document #: LTRT-10532
Mediant 500L Gateway & E-SBC
Parameter Description
;
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
PRACK Mode
prack-mode
[PrackMode]
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.
Enable Early Media
early-media
[EnableEarlyMedia]
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
438 or Configuring Tel Profiles on page 471.
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.
Enable Early 183
early-183
[EnableEarly183]
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 438.
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.
[IgnoreAlertAfterEarlyMedia] 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