User Guide

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Outbound Proxy Server: To display and configure Outbound Proxy
server settings.
An outbound proxy server is used to receive all initiating request
messages and route them to the designated SIP server.
Note: If configured, all SIP request messages from the IP phone will be
sent to the outbound proxy server forcefully.
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: A DNS RR for specifying the location of services.
NAT: To display and configure NAT(Net Address Translator) settings.
STUN: Short for Simple Traversal of UDP over NATS, a solution to solve
NAT issues.
Note: By default, NAT is disabled.