User's Manual 67. Configuration Parameters Reference
Version 6.8 845 Mediant 500L MSBR
Parameter Description
[1] Supported (default)
[2] Required
Notes:
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.
Web/EMS: Enable Early
Media
CLI: early-media
[EnableEarlyMedia]
Global parameter that enables 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. For a detailed
description of this parameter and for configuring this functionality in
the IP Profile table, see ''Configuring IP Profiles'' on page 332 or in
the Tel Profile table, see Configuring Tel Profiles on page 327.
Notes:
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.
This parameter is applicable only to the Gateway application.
Web/EMS: Enable Early 183
CLI: 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 this
parameter and for configuring this functionality in the IP Profile table,
see Configuring IP Profiles on page
332.
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] Determines the device's interworking of Alerting messages from PRI
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 device sends a 180 (without SDP). If it receives an
Alert with PI it sends a 183with an SDP.
When disabled, the device sends additional 18x responses as a
result of receiving Alerting and Progress messages, regardless of
whether or not a 18x response was already sent.
Note: This parameter is applicable only if the EnableEarlyMedia
parameter is set to 1 (i.e., enabled).
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