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ACCOUNT/NETWORK SETTINGS
IP address or Domain name of the Primary Outbound Proxy, Media
Gateway, or Session Border Controller. It's used by the phone for
Outbound Proxy
Firewall or NAT penetration in different network environments. If a
symmetric NAT is detected, STUN will not work and ONLY an
Outbound Proxy can provide a solution.
IP address or Domain name of the Secondary Outbound Proxy, Media
Secondary Outbound Proxy
Gateway, or Session Border Controller. Secondary outbound proxy will
be used when the primary outbound proxy fails.
This parameter controls how the Search Appliance looks up IP
addresses for hostnames. There are three modes: A Record, SRV,
DNS Mode
NAPTR/SRV. The default setting is "A Record". If the user wishes to
locate the server by DNS SRV, the user may select "SRV" or
"NATPTR/SRV".
This parameter configures whether the NAT traversal mechanism is
activated. Users could select the mechanism from NAT NO, STUN,
Keep-alive, UPnP, Auto or VPN. The default setting is "Keep-alive".
If set to "STUN" and STUN server is configured, the phone will route
according to the STUN server. If NAT type is Full Cone, Restricted
NAT Traversal
Cone or Port-Restricted Cone, the phone will try to use public IP
addresses and port number in all the SIP&SDP messages. The phone
will send empty SDP packet to the SIP server periodically to keep the
NAT port open if it is configured to be "Keep-alive". Configure this to
be "NAT NO" if an outbound proxy is used. "STUN" cannot be used if
the detected NAT is symmetric NAT. Set this to "VPN" if OpenVPN is
used.
A SIP Extension to notify the SIP server that the phone is behind a
Proxy-Require
NAT/Firewall. Do not configure this parameter unless this feature is
supported on the SIP server.
Firmware Version 1.0.1.54
GXV3275 Administration Guide
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