AVer EVC900 - Manual (Page 64)

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NAT Configuration
AVer EVC supports NAT systems that use the
internal IP addresses to communicate with
other devices outside the LAN.
NAT Public (WAN) Address
The NAT public address must be entered
when you enable the feature on NAT
configuration.
SIP
Session Initiation Protocol (SIP) allows you around the world to communicate using your supported
devices over the Internet.
Select Network│SIP and press .
Configure the following relative items to setup
the SIP.