Yealink VC400 Administrator's Manual page 141

Parameter
both sites, the VC400/VC120 can call
the far site by dialing an IP address
directly.
Configures the type of transport
protocol for the SIP IP call.


Transport

Default: TCP
To configure SIP IP call via web user interface:
Click on Account->SIP IP Call.
1.
Select the desired value from the pull-down list of SIP IP Call Enable.
2.
Select the desired value from the pull-down list of Transport.
3.
Click Confirm to accept the change.
4.
To configure SIP IP call via the remote control:
Select Menu->Advanced (default password: 0000)->SIP IP Call.
1.
Select the desired value from the pull-down list of SIP IP Call Enable.
2.
Description
UDP—provides best-effort
transport via UDP for SIP
signaling.
TCP—provides reliable
transport via TCP for SIP
signaling.
DNS-NAPTR—performs the
DNS NAPTR and SRV queries
for the service type and port if
no server port is given.
Configuring Call Preferences
Configuration Method
Remote Control
Web User Interface
125