IP0120/IP0121 User Manual
24
If the IP Phone does not register to any proxy server, it still can call to
other IP phone by calling the IP address directly.
E.
(Yes / No) Outbound Proxy – please set this item to Yes if the registration
needs to pass through the Outbound Proxy server.
Notice: Most of the proxy servers now have the built-in ability to let IP Phone
pass through the NAT/router devices, and this pass-through function does not
need the IP Phone to change anything. This method is also more reliable and
easier and successful than the other NAT pass-through method like STUN or
others. The Outbound Proxy method is just very like the Proxy server built-in
NAT pass-through solution, except that the packets need to pass through the
Outbound proxy server. And of course, this pass-through method does not need
the IP Phone to change anything.
