MediaPack SIP
MediaPack SIP User’s Manual 52 Document #: LTRT-65405
2. Configure the general parameters under Protocol Definition according to Table 5-1.
3. Click the Submit button to save your changes.
4. To save the changes so they are available after a power fail, refer to Section
5.9 on page
161.
Table
5-1: Protocol Definition, General Parameters (continues on pages 52 to 55)
Parameter Description
PRACK Mode
[PRACKMode]
PRACK mechanism mode for 1XX reliable responses:
Disable [0].
Supported [1] (default).
Required [2].
Note 1: The Supported and Required headers contain the ‘100rel’ parameter.
Note 2: MediaPack sends PRACK message if 180/183 response is received with
‘100rel’ in the Supported or the Required headers.
Channel Select Mode
[ChannelSelectMode]
Port allocation algorithm for IP to Tel calls.
You can select one of the following methods:
• By phone number [0] = Select the gateway port according to the called number
(called number is defined in the ‘Endpoint Phone Number’ table).
• Cyclic Ascending [1] = Select the next available channel in an ascending cycle
order. Always select the next higher channel number in the hunt group. When the
gateway reaches the highest channel number in the hunt group, it selects the
lowest channel number in the hunt group and then starts ascending again.
• Ascending [2] = Select the lowest available channel. Always start at the lowest
channel number in the hunt group and if that channel is not available, select the
next higher channel.
• Cyclic Descending [3] = Select the next available channel in descending cycle
order. Always select the next lower channel number in the hunt group. When the
gateway reaches the lowest channel number in the hunt group, it selects the
highest channel number in the hunt group and then starts descending again.
• Descending [4] = Select the highest available channel. Always start at the highest
channel number in the hunt group and if that channel is not available, select the
next lower channel.
• Number + Cyclic Ascending [5] = First select the gateway port according to the
called number (called number is defined in the ‘Endpoint Phone Number’ table). If
the called number isn’t found, then select the next available channel in ascending
cyclic order. Note that if the called number is found, but the port associated with this
number is busy, the call is released.
The default method is ‘By Phone Number’.
Enable Early Media
[EnableEarlyMedia]
No [0] = Early Media is disabled (default).
Yes [1] = Enable Early Media.
If enabled, the gateway sends 183 Session Progress response with SDP (instead of 180
Ringing), allowing the media stream to be set up prior to the answering of the call.
Note that to send 183 response you must also set the parameter ‘ProgressIndicator2IP’
to 1. If it is equal to 0, 180 Ringing response is sent.
Note: Generally, this parameter is set to 1.
Session-Expires Time
[SIPSessionExpires]
Determines the timeout (in seconds) for keeping a re-INVITE message alive within a SIP
session. The SIP session is refreshed (using INVITE) each time this timer expires.
The default is 0 (not activated).
Minimum Session-Expires
[MINSE]
Defines the time (in seconds) that is used in the Min-SE header field. This field defines
the minimum time that the user agent supports for session refresh.
The valid range is 10 to 100000. The default value is 90.
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