D-Link DPH-150S - Server Settings; NAT Traversal

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6.7.3. Server Settings
This page can be used to set the server’s parameters of an account.
Authentication Expired Time: when the time expires, the client must register itself on the SIP server again.
Register Server Address: Assigns the SIP Register Server’s IP address.
Register Server Port: Register server port of a certain SIP domain.
Proxy Address: Assigns the Proxy server’s IP address.
Proxy Port: Assigns the Proxy server’s port.
Use Outbound Proxy: If all outgoing SIP request send to outbound proxy.
DNS SRV support: If SRV DNS be support. (SRV- A DNS RR for specifying the location of services)
Call Waiting: If Call Waiting function be enabled or disabled.
6.7.4. NAT Traversal
The page help customer to set STUN parameters.