AudioCodes Mediant 500 MSBR, Руководство пользователя

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Version 7.2 1049 Mediant 500 MSBR
User's Manual 74. Configuration Parameters Reference

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 feature per specific calls, using IP Profiles
(IpProfile_EnableEarlyMedia) or Tel
Profiles(TelProfile_EnableEarlyMedia). For a detailed description of the
parameter and for configuring the feature, see Configuring IP Profiles
on page
404 or Configuring Tel Profiles on page 440.
Note:

If the feature 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 feature per specific calls, using IP Profiles
(IpProfile_EnableEarly183). For a detailed description of the parameter
and for configuring this feature in the IP Profiles table, see Configuring
IP Profiles on page 404.
Note: If this feature is configured for a specific IP Profile, the settings of
this global parameter is ignored for calls associated with the IP Profile.
[IgnoreAlertAfterEarlyMed
ia] 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 case, early media is
played to the ISDN side and then the ringback tone is played by the
IP PBX.

[1] = Enable. If the device sends a 183 response with SDP (due to a
received ISDN Progress or Proceeding with PI messages) and an
Alerting message is then received from the ISDN side (with or
without Progress Indicator), the device does not send a 180 Ringing
response to the caller and the voice channel remains open.
Therefore, in this case, early media is played to the ISDN side and a
ringback tone is not played by the IP PBX.
Note:

The parameter is applicable only to digital interfaces.

The parameter is applicable only if the EnableEarlyMedia parameter
is set to 1 (i.e., enabled).
183 Message Behavior
configure voip > sip-
definition settings > 183-
msg-behavior
Digital: Defines the ISDN message that is sent when the 183 Session
Progress message is received for IP-to-Tel calls.
Analog: Defines the response of the device upon receipt of a SIP 183
response.