User Guide

13
E11R
Admin Guide
messages and route them to the designated SIP server.
3.4.2.3. Transport Type
To display and configure transport type for SIP message.
There are 4 transport types in total.
 UDP: UDP is an unreliable but very efficient transport layer
protocol.
 TCP: Reliable but less-efficient transport layer protocol.
 TLS: Secured and reliable transport layer protocol.
 DNS-SRV: DNS record for specifying the location of services.
3.4.2.4. NAT
To display and configure NAT settings.
 STUN: Short for session traversal utilities for NAT, a solution to
solve NAT issues.
Note:By default, NAT is disabled.
After all, press the push button to make direct IP call.
Figure 3.4.2.4Transport type
Figure 3.4.2.5NAT