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 report
Enable/Disable system to support RFC3581. Via
report 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
Different VoIP Service providers may provide
different modes.
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 RFC3261 as default.
Transport Protocol
Set transport protocols, TCP or UDP;
