User's Manual

Grandstream Networks, Inc. GXV3175 USER MANUAL Page 48 of 60

FIRMWARE VERSION 1.0.1.1 Updated : 3/2012

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”.

Proxy Require Notifies the SIP server that the unit is behind a NAT/Firewall.

Account/SIP Settings

SIP Registration Selects whether or not the GXV3175 will send a SIP Register message to

the proxy; The default setting is YES.

Unregister On Reboot If set to YES, the SIP user registration messages will be cleared on reboot.

The default setting is YES.

This defines the expiration time of the registration in minutes. The default

value is 50 minutes; the maximum value is 65535 minutes (approximately

45 days) and the minimum value is 5 minutes.