7
Register
Expire
Time
Set expire time of SIP server register, default is 60
seconds. If the register time of the server requested is
longer or shorter than the expire time set, the phone will
change automatically the time into the time recommended
by the server, and register again.
NAT Keep
Alive
Interval
Set examining interval of the server, default is 60 seconds
User Agent
Set the user agent if you have, the default is VoIP Phone
1.0.
Signal Key
Set the key for signal encryption.
Media Key
Set the key for RTP encryption.
Local port
Set sip port of each line.
Enable
Subscribe
Enable the option, the phone will receive the notify from
the server.
Enable
Keep
Authenticat
ion
Enable or Disable. Keep Authentication. If it is enabled,
system will take the last authentication field which is
passed the authentication by server to the request packet. It
will decrease the server’s repeated authorization work
NAT Keep
Alive
If some servers refuse to register with too short interval
time and have no packets sending to device in private
network to keep NAR alive, you could set this function
ON. It needs to set the keep alive interval time less than
the NAT server’s.
Enable Via
rport
Enable or disable system to support RFC3581. Via rport is
a special way to realize SIP NAT.
Enable
PRACK
Enable/Disable SIP PRACK function (basically is used at).
Suggest using the default configuration.
Long
Contact
Set more parameters in contact field, connect with SEM
server.
Enable URI
Convert
Convert # to %23 when send the URI.
Enable
DNS SRV
Support DNS looking up with _sip.udp mode
Ban
Anonymous
Call
Set to ban anonymous Call.
Backup
Server port
Configure the backup server port.
RFC
Protocol
Edition
Select SIP protocol version to adapt for the SIP server
which uses the same version as you select. For example, if
the server is CISCO5300, you need to change to RFC2543,
else phone may not cancel call normally. System uses
