User Guide

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R20K
Admin Guide
3.4.6. Transport Type
To display and configure transport type for SIP message.
 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.
3.4.7. 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.
Press the a SIP account and “Dial key”to make a SIP call.
Figure 3.5.2.4Transport type
Figure 3.5.2.5NAT