3.4.5. Transport Type
To display and configure transport type for SIP message.
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UDP: UDP is an unreliable but very efficient transport layer
protocol.
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TCP: Reliable but less-efficient transport layer protocol.
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TLS: Secured and reliable transport layer protocol.
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DNS-SRV: DNS record for specifying the location of services.
3.4.6. NAT
To display and configure NAT settings.
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STUN: Short for session traversal utilities for NAT, a solution to
solve NAT issues.
Note:
By default, NAT is disabled.