Akuvox E21 Series - Transport Type; Nat

16
E21A/V
Admin Guide
3.4.2.5. 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.
3.4.2.6. NAT
To display and configure NAT settings.
 STUN: Short for simple traversal of UDP over NATs, a solution
to solve NAT issues.
Notes: By default, NAT is disabled.
Figure 3.4.2.6 NAT
Figure 3.4.2.5 Transport type