Application Guide

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DP750/DP720 Administration Guide
Version 1.0.3.37
SIP Settings - Security Settings
Validate Incoming
Messages
Defines whether incoming messages will be validated or not.
Default is No.
Check SIP User ID
for Incoming INVITE
Checks SIP User ID in the Request URI of incoming INVITE; if it doesn't match the
base SIP User ID, the call will be rejected. Direct IP calling will also be disabled.
Default is No.
Accept Incoming
SIP from Proxy
Only
Checks SIP address of the Request URI in the incoming SIP message; if it doesn't
match SIP server address of the account, the call will be rejected.
Default is No.
Authenticate
Incoming INVITE
Challenges the incoming INVITE for authentication with SIP 401 Unauthorized
message.
Default is No.
Authenticate Server
Certificate Domain
Checks server TLS certificate to ensure that common name matches the configured
SIP server.
Default is No.
Authenticate Server
Certificate Chain
Checks server TLS certificate to ensure that it is authorized by a known certificate
authority.
Default is No.
Trusted CA
Certificate
Treats entered certificate as a valid CA for authenticating the server TLS certificate.
Default is No.
Audio Settings
Send DTMF
Specifies the mechanism to transmit DTMF digits. There are 3 supported modes:
• In audio: which means DTMF is combined in the audio signal (not very reliable
with low-bit-rate codecs);
• Via RTP (RFC2833): permits to specify DTMF with RTP packet. Users could
know the packet is DTMF in the RTP header as well as the type of DTMF;
• SIP INFO: uses SIP INFO to carry DTMF. The defect of this mode is that it's
easily to cause desynchronized of DTMF and media packet for the reason the
SIP and RTP are transmitted respectively.
Default is via RTP (RFC2833)
Disable DTMF
Negotiation
Uses above DTMF order without negotiation.
Default is No.
DTMF Payload Type
Defines payload type for DTMF using RFC2833.