Additional Support - Grandstream Networks HT702 Setup And Troubleshooting Manual

Phone.com Setup and Troubleshooting Guide
Grandstream HT702 Analog Telephone Adapter (ATA)
If you have a router where this feature cannot be disabled:
●
Consider putting your VoIP device in the router's DMZ. (Consult the user guide for your
router for specific guidance.) Though this will expose that device to the internet, it
eliminates the SIP ALG issue for it, while still using your existing network hardware. Most
consumer routers can only assign one IP address to the DMZ.
●
Consider purchasing a router where disabling this feature is possible. This way your VoIP
device can remain behind the protection of the router's firewall.
Make sure your network is not "double-NAT"ted.
Network Address Translation (NAT) is what a router does to get traffic to your computer. "Double-
NAT" is an issue where two routers are placed one after another. This can be a common issue if,
for example, someone adds a router to a network that already has a modem/router combination
device.
A computer that is behind a double-NAT setup can usually still browse the web, while other
activities like sending and receiving email might be problematic. More advanced applications—like
VoIP—are not likely to work at all.
To resolve this issue, you will need to put the modem/router device into "bridged" mode. Most
modem/router combination devices will allow this. This will disable all routing and NAT functions on
the modem/router, so only the standalone router will perform these functions.
DSL modem/routers may support "half-bridged" mode, where the modem will take care of the login
authentication but leaves the NAT functions to the standalone router. If "half-bridged" mode is not
possible, select "bridged" mode instead, and input the login authentication details into the
standalone router. Contact your internet service provider if you need specific guidance.
In the end, this guide should help you get your Grandstream HT702 ATA up and running with your
Phone.com service, and help you use some of its basic features.
Hopefully, the Troubleshooting section helped if you experienced any issues with setting up your ATA or
using your phone. If you still have any questions or require further assistance, you can reach Phone.com
Customer Care 24×7. Simply send an email to support@phone.com, visit us on the web at
https://www.phone.com/customer-support/, or call us at 1-800-998-7087.
Thank you for reviewing this information!
Grandstream, the Grandstream logo, and Grandstream images are trademarks of Grandstream Networks, Inc. and/or its
affiliates in the U.S. and other countries. Third party trademarks mentioned are the property of their respective owners.
The Crystal Project and Open Icon Library icons are licensed under the GNU General Public License.
OSA Icon Library files are licensed under the Creative Commons ShareAlike license.
7 / 7

Additional Support

© 2012 Phone.com, Inc. All rights reserved
Revised: 30 October 2012