Yealink VC400 - Page 145

Configuring Call Preferences
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protocol. So configuration parameters of SIP IP call are divided from the SIP account. You can
configure SIP IP call separately.
SIP IP call parameters on the system are described below:
Parameter
Description
Configuration Method
SIP IP Call
Enables or disables the SIP IP Call.
Default: Enabled.
Note: When it is set to Enabled on
both sites, the VC400/VC120 can call
the far site by dialing an IP address
directly.
Remote Control
Web User Interface
Transport
Configures the type of transport
protocol for the SIP IP call.
 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.
Default: TCP
Remote Control
Web User Interface
To configure SIP IP call via web user interface:
1. Click on Account->SIP IP Call.
2. Select the desired value from the pull-down list of SIP IP Call.