User`s manual

Version 5.4 135 May 2008
SIP User's Manual 3. Web-Based Management
2. Configure the parameters according to the table below.
3. Click the Submit button to save your changes.
4. To save the changes to flash memory, refer to ''Saving Configuration'' on page 265.
Table 3-31: SIP General Parameters (Protocol Definition)
Parameter Description
PRACK Mode
[PRACKMode]
PRACK (Provisional Acknowledgment) mechanism mode for 1xx SIP
reliable responses.
 [0] Disable
 [1] Supported (default)
 [2] Required
Notes:
 The Supported and Required headers contain the '100rel' tag.
 The device sends PRACK messages if the 180/183 response is
received with '100rel' in the Supported or Required headers.