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SIP-PRACK function (used by "Color Ring Back
Tone") Recommend
：
Use the default
configuration.
Convert URI
: When you send URI it will
convert # to %23.
Enable DNS SRV
: Configure whether to enable
RFC2782 protocol edition.
Enable displayname quote
: Set to make
quotation mark to display name as the phone
sends out signal, in order to be compatible with
server.
Use Stun
: Enable/Disable SIP STUN.
Enable BLF List: Enable/Disable BLF List.
BLF List
number:
Input the number of BLF List.
Enable session timer
: Enable/Disable session
timeout.
Session timeout(s)
: Set the time of session
timeout.
Backup server address
: Configure a backup
server address. When the primary server is not
connected, you can use the backup server for
calling communications (The backup server can
be connected only when the primary server
cannot connect); When the primary server is
connected, the phone will automatically switch
back to the primary server to communicate.
Backup server port: Configure the backup server
port.
Multi-media Video Phone UTT-990 User Manual
