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;
Anonymous call
Edition
Set Anonymous call out safely; Support
RFC3323and RFC3325;
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.
Answer With A
Single Codec
Enable/Disable the function when call is
incoming, phone replies SIP message with just
one codec which phone supports.
Auto TCP
Set to use automatically TCP protocol to
guarantee usability of transport as message is
above 1300 byte
Enable Strict Proxy
Support the special SIP server-when phone
receives the packets sent from server,phone will
use the source IP address, not the address in via
