Grandstream Networks GXV3175 manual Account/Network Settings

		service provider.
	SIP User ID	User account information provided by the VoIP service provider; normally
		similar to a telephone number or an actual telephone number.
	Authenticate ID	The authenticate ID for the SIP user. It can differ or be the same as the SIP
		user ID.
	Authenticate password	The password that the GXV uses to authenticate with the ITSP (SIP) server.
		After it is saved, this will appear as blank for security reasons. The
		maximum length is 25 characters.
	Voice Mail User ID	When this is configured, the user can dial to the voicemail server using the
		MESSAGE button. This ID is normally the feature code for Voice Mail.
	Name	The Caller ID that will be displayed for the account.
	Tel URI	The default setting is “Disable”. If the Video phone has an assigned PSTN
		number, this field should be set to “Enable”. If “User=Phone” is set, a
		“User=Phone” parameter will be attached to the “From header” in the SIP
		request to indicate the E.164 number.
Account/Network Settings
	Outbound Proxy	IP address or Domain name of the Outbound Proxy, or Media Gateway, or
		Session Border Controller. Used by the GXV3175 for firewall or NAT
		penetration in different network environments. If a symmetric NAT is
		detected, STUN will not work and ONLY an Outbound Proxy will work.
	DNS Mode	The default is set to A Record. If the user wishes to locate the server by DNS
		SRV, the user may select SRV or NATPTR/SRV.
	NAT Traversal	This setting decides whether the NAT traversal mechanism is activated. If it
		is set to “STUN” and STUN server is configured, the GXV3175 will route
		according the STUN server. In this mode, the STUN client embedded in the
		phone will communicate with the appointed STUN server to examine which
		type of Firewall/NAT setting is employed. If the type of NAT detected is Full
		Cone, Restricted Cone or Port-Restricted cone, the phone will try to use
		public IP addresses and port in all the SIP and SDP messages.
		If the “NAT Traversal” is configured to be “Keep-alive”, the phone will send
		an empty SDP packet (without payload data) to the SIP server once in 20
		seconds to keep the NAT port open.
		If VPN is used, users should select “VPN” for NAT Traversal.
		Users could also set “Auto” or “UPnP” according to the network
		configuration.
		If an outbound proxy server is used, please configure this to be “NAT NO”.
Grandstream Networks, Inc.		GXV3175 USER MANUAL	Page 49 of 119
		FIRMWARE VERSION 1.0.0.32	Updated : 12/2010