User guide

26
keeping NAT alive
User Agent Set the user agent name to show the
information of C4110
Signal Key Fill in the key for SIP encryption
according to the Server type
selected. Default is common
Media Key Fill in the key for Media encryption
according to the Server type
selected. Default is common
Server Type Set SIP server type if server is
special or encrypted server
DTMF Mode Set DTMF sending mode, support
RFC2833, DTMF_RELAY and SIP
info
RFC Protocol Edition Enable the phone to use protocol
edition. When the phone needs to
communicate with phones using
SIP1.0 such as CISCO5300 and so
on, needs to modify into RFC2543.
the default is to RFC3261
Forward Phone Number Set the selected Line’s call forward
number
Enable PRACK Enable / Disable SIP prack function.
Default is unchecked. Prack is same
with ACK that is used for temporary
response.Prack is one of SIP
request info
Enable Keep Authentication Enable /disable support register with
authentication, so that C4110
needn`t carry authentication field,
response each time. When server
receive the register request with
authentication, server will response
200 message, not 401
NAT Keep Alive Enable/disable NAT keep alive
function
Enable Session Timer Enable/disable support RFC4028.
Signal Encode Enable/disable signal Encryption
according to the server type.
Rtp Encode Enable/disable Voice encryption
according to the server type