Grandstream Networks, Inc., 1297 Beacon St., 2
nd
Flr, Brookline, MA 02446 USA
Tel: (617) 566-9300, FAX: (617) 249-1987
www.grandstream.com
service provider).
4. GXW40xx supports “Plug-n-Call” if your ITSP (Internet Telephone Service Provider)
provides this automatic provisioning service. Ensure the gateway has an Internet
connection (either DHCP or static IP in your Internet ready network), then power up the
gateway.
5. Please contact your ITSP for additional settings that may be necessary to configure the
device.
Important Settings
Most of the settings on the web configuration pages should be kept to default value. But there
are some settings that need to be configured according to the local network environment.
A. NAT Settings
If GXW40xx is connected behind a firewall, an Outbound Proxy or a STUN server must be
configured to solve the NAT issue. Here are four settings that can be useful in such a scenario:
1. STUN Server (under Advanced Settings page)
Enter a STUN Server IP or FQDN in this field.
2. Outbound Proxy (Under Profile pages)
Enter an Outbound Proxy server IP or FQDN.
3. Use Random Ports (under Advanced Settings page)
By default, this field is set to No. It may needs to be set to “Yes” depending on your network
environment.
4. NAT Traversal (under the Profile pages)
Set to Yes.
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