Grandstream Networks DP752 Administration Manual page 53

UAS Specify Specifies which end will act as refresher for incoming calls:
Refresher
Default is Omit
Force INVITE Uses INVITE message to refresh the session timer. Default is No.
Security Settings
Validate Incoming Defines whether incoming messages will be validated or not. Default is No.
Messages
Check SIP User ID Checks SIP User ID in the Request URI of incoming INVITE; if it doesn't match the
for Incoming INVITE base SIP User ID, the call will be rejected. Direct IP calling will also be disabled.
Default is No.
Accept Incoming Checks SIP address of the Request URI in the incoming SIP message; if it doesn't
SIP from Proxy match SIP server address of the account, the call will be rejected. Default is No.
Only
Authenticate Challenges the incoming INVITE for authentication with SIP 401 Unauthorized
Incoming INVITE message. Default is No.
Authenticate Server Checks server TLS certificate to ensure that common name matches the configured
Certificate Domain SIP server. Default is No.
Authenticate Server Checks server TLS certificate to ensure that it is authorized by a known certificate
Certificate Chain authority. Default is No.
Trusted CA Treats entered certificate as a valid CA for authenticating the server TLS certificate.
Certificate Default is No.
Audio Settings
DTMF Settings
Send DTMF Specifies the mechanism to transmit DTMF digits. Default is via RTP (RFC2833)
• In audio: which means DTMF is combined in the audio signal (not very reliable
• Via RTP (RFC2833): permits to specify DTMF with RTP packet. Users could
• SIP INFO: uses SIP INFO to carry DTMF. The defect of this mode is that it's
•
UAS: The base station acts as the refresher.
•
UAC: Callee or proxy server act as the refresher.
with low-bit-rate codecs);
know the packet is DTMF in the RTP header as well as the type of DTMF;
easily to cause desynchronized of DTMF and media packet for the reason the
SIP and RTP are transmitted respectively.
DP752/DP730/DP722 Administration Guide
Version 1.0.11.4
P a g e | 53