User's Manual 452 Document #: LTRT-27055
Mediant 1000B Gateway & E-SBC
Parameter Description
RTP channel before receiving the "progress" tone from the ISDN
side. The device sends RTP packets immediately upon receipt of
an ISDN Progress, Alerting with Progress indicator, or Connect
message according to the initial negotiation without sending the
183 response again, thereby saving response time and avoiding
early media clipping.
Note:
The parameter is applicable only to IP-to-Tel ISDN calls, and
applies to all calls.
To enable this feature, set the EnableEarlyMedia parameter to 1.
When the BChannelNegotiation parameter is set to Preferred or
Any, the EnableEarly183 parameter is ignored and a SIP 183 is
not sent upon receipt of an INVITE. In such a case, you can set
the ProgressIndicator2IP parameter to 1 (PI = 1) for the device to
send a SIP 183 upon receipt of an ISDN Call Proceeding
message.
The corresponding global parameter is EnableEarly183.
Early Answer Timeout
early-answer-timeout
[IpProfile_EarlyAnswerTimeou
t]
Defines the duration (in seconds) that the device waits for an ISDN
Connect message from the called party (Tel side), started from when
it sends a Setup message. If this timer expires, the call is answered
by sending a SIP 200 OK message (to the IP side).
The valid range is 0 to 2400. The default is 0 (i.e., disabled).
Note:
The parameter is applicable only to digital interfaces.
The corresponding global parameter is EarlyAnswerTimeout.
Profile Preference
ip-preference
[IpProfile_IpPreference]
Defines the priority of the IP Profile, where 20 is the highest priority
and 1 the lowest priority.
Note:
If an IP Profile and a Tel Profile apply to the same call, the coders
and other common parameters of the profile with the highest
preference are applied to the call. If the preference of the profiles
is identical, the Tel Profile parameters are applied.
If the coder lists of both an IP Profile and a Tel Profile apply to the
same call, only the coders common to both are used. The order
of the coders is determined by the preference.
The parameter is applicable only to the Gateway application.
Coders Group
coders-group
[IpProfile_CodersGroupName]
Assigns a Coder Group, which defines audio coders supported by
the SIP entity associated with the IP Profile.
The default value is the default Coder Group
("AudioCodersGroups_0"). To configure Coder Groups, see
Configuring Coder Groups on page 415.
Play RB Tone to IP
play-rbt-to-ip
[IpProfile_PlayRBTone2IP]
Enables the device to play a ringback tone to the IP side for IP-to-Tel
calls.
[0] Disable (Default)
[1] Enable = Plays a ringback tone after a SIP 183 session
progress response is sent.
Note:
To enable the device to send a 183/180+SDP responses, set the
EnableEarlyMedia parameter to 1.
If the EnableDigitDelivery parameter is set to 1, the device
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