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External Media Port
External
media
port
NOTE:
It has to be complied with the settings of virtual server of the NAT devices if IP Phone enables the configuration
manually.
6.15 NAT Traversal Settings UPnP Setting
UPnP
Enable or disable universal plug and play. Some NAT supports UPnP so
STUN is not required and must be disabled.
6.16 NAT Traversal Settings NAT Keep Alive Time Settings
Always send keepalive packet
Enable or disable to keep the channel which is created for SIP signaling
alive.
KeepAlive Time
The time interval that the IP phone always sends the keepalive packet in
order to ensure NAT works properly.
6.17 Voice Setting
