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Enable subscribe
Enable the option ,the phone will receive the notify from the
server.
Enable Keep
Authentication
Enable/Disable Keep Authentication System will take the last
authentication field which is passed the authentication by server
to the request packet. It will decrease the server’s repeat
authorization work, if it is enable.
NAT Keep Alive
Enable/Disable keeps NAT of SIP alive.
If some server refuse to register with too short interval time, and
has no packets sending to device in private network to keep NAT
alive, user could set this function ON. It need set the keep alive
interval time less than the NAT server’s.
Enable Via rport
Enable/Disable system to support RFC3581. Via rport is special
way to realize SIP NAT.
Enable PRACK
Enable or disable SIP PRACK function, suggest use the default
config.
Long Contact
Set more parameters in contact field; connection with SEM
server
Enable URI Convert
Convert # to %23 when send the URI.
Dial Without Register
Set call out by proxy without registration;
Ban Anonymous Call
Set to ban Anonymous Call;
Enable DNS SRV
Support DNS looking up with _sip.udp mode
Forward Type
Select call forward mode, the default is Off
Off
：
Close down calling forward
Busy
：
If the phone is busy, incoming calls will be forwarded
to the appointed phone.
No answer
：
If there is no answer, incoming calls will be
forwarded to the appointed phone.
Always
：
Incoming calls will be forwarded to the appoint
phone directly.
The phone will Prompt the incoming while doing forward.
Forward Phone Number
Appoint your forward phone number.
Server Type
Select the special type of server which is encrypted, or has some
unique requirements or call flows.
DTMF Mode
Select DTMF sending mode, there are three modes:
DTMF_RELAY
DTMF_RFC2833
DTMF_SIP_INFO