User`s manual

MediaPack
SIP User's Manual 58 Document #: LTRT-65408
2. Configure the general parameters under Protocol Definition according to Table 5-3.
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 5.10.2 on
page 205.
Table 5-3: Protocol Definition, General Parameters (continues on pages 58 to 64)
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 Dest 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.
 Dest 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.
 By Source Phone Number [6] = Select the gateway port according to the
calling number.
The default method is ‘By Phone Number’.
Enable Early Media
[EnableEarlyMedia]
Disable
[0] = Early Media is disabled (default).
Enable
[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 each time this timer expires. The SIP
method used for session-timer updates is determined according to the parameter
SessionExpiresMethod.
The default is 0 (not activated).
Minimum Session-Expires
[MINSE]
Defines the time (in seconds) that is used in the Min-SE header. This header
defines the minimum time that the user agent supports for session refresh.
The valid range is 10 to 100000. The default value is 90.