D-Link DVG-1402S manual Domain Name, Port, Secondary SIP Server, Outbound Proxy, Service Domain

Server FQDN	Use this drop-down menu to Enable or Disable the Server
	Fully Qualified Domain Name (FQDN) function. This is
	disabled when the SIP URL domain name is different from
	the SIP proxy server domain name. The phone will then use
	the domain name in Domain Name field as part of SIP URL
	but send and receive SIP messages through the SIP proxy
	server defined in the Service Domain field.
IP Address	Enter the IP address of the SIP Server in this field.
Domain Name	Enter the domain name corresponding to the IP address
	entered above in this field.
Port	Enter the SIP server’s listening port for the SIP in this field.
	Leave this field set to the default if your VoIP service
	provider did not give you a server port number for SIP.
Secondary SIP Server	The Secondary Features (FQDN, IP address, domain name
	and port), act as a backup for the initial connections’ settings.
	In the event that the connection with the SIP server is lost,
	the backup settings will be used.
Outbound Proxy	The Outbound Proxy is a normal SIP proxy.	If instructed to do so
	by your ISP, enable the Outbound Proxy, and enter its IP address,
	Domain Name and Port Number in the appropriate fields.
Service Domain	Enter the SIP service domain name in this field.
URL Format	Select SIP-URLto have the router include the domain name
	with the SIP number in the SIP messages that it sends.
	Select TEL-URLto have the router use the SIP number
	without a domain name in the SIP messages that it sends.
User Parameter	You can set this to phone or none.	This determines
	whether or not the phone number is appended to the
	information forwarded to your SIP server. Your VoIP
	service provider will instruct you which setting to use.
Caller ID Delivery	Use this pull-down menu to initiate the delivery of the
	inbound caller ID.
Display CID	Use this pull-down menu to enable or disable the display of
	the Caller ID.
Timer T2	Set the timer to 4, 8, 16 or 32.
Initial Unregister	Enable or disable the initial unregister.
Register Expiration	Use this field to set how long the router will wait before
	sending a repeat registration request if a registration attempt
	fails or there is no response from the registration server.
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