Set the standard to be used for anonymous
Set call out by proxy without registration
Set the user agent, the default is Model with Software Version.
If setting enabled, the device will use single codec in response to an
incoming call request
Set the ring tone type for the line
Set the type of call conference, Local=set up call conference by the
device itself, maximum supports two remote parties, Server=set up
call conference by dialing to a conference room on the server
Set the conference room number when conference type is set to be
Server
Set the timeout of call transfer process
Allow more parameters in contact field per RFC 3840
Active capture package SDP is inactive, while the hold is sendrecv.
Active capture package has no response of 400, etc. Hold the hair
inactive
After closing the grab packet, you can see that the DSP is sendonly
and the hold is sendrecv
Whether to add quote in display name
Set the line to collaborate with specific server type
Set the SIP expiration interval
Set the line to use VPN restrict route
Set the line to use STUN for NAT traversal
Convert not digit and alphabet characters to %hh hex code
Set the DTMF sending mode, there are four types:
In-band
RFC2833
SIP_INFO
AUTO
Different service providers may offer different models
When the device's DTMF type is set to SIP_INFO
The DTMF_SIP_INFO type is configured to send */#, and when the