Grandstream H801 keeps losing connection to 8x8 server/service


I am migrating about 200 sites from BT to 8x8 and as the Obihai300/302 is now obsolete we have adopted the Grandstream H801 and H802.
Most of our phones are sip deskphones but most sites have 2 or 3 analogue walkabout phones. I have found that on a regular Whilst the device is still connected to our network and i can access the GUI, the Grandstream ata will lose connectivity to the 8x8 server and calls will fail. Only a reboot will allow the ata to once again join the 8x8 server and calls restored. Users are losing faith in the combination. Is there anything i can tweak to stop this happening such as keepalive time. Also is there an option to get the ata to reboot every night say at midnight so that if it has lost connectivity it will self-restore.
thanks in advance.


When you access the webgui, is the port displayed as registered?

There is option sip for keep alive under the fxs settings
You can also reduce the register expiration to make it renew the registration in a shorter period.

For the reboot you can schedule it via

Make sure that you have the latest firmware version on the HTs!

If none of this helps, it is better to collect syslog from the unit and check if it is an issue with the sip server or it is the ata.


I do not use these devices, but there may be a simple solution for forcing the reboot. If these are powered from your main electrical (110v in USA) then you can get a Lamp/Appliance Timer and set a short period of time that the device is turned off. This is certainly not a long-term solution, but something that might quickly improve the reliability.

I agree that checking the status of Registration is the first thing to look at.



If you have to do a reboot, it is because your H 801/802 is no longer recorded and when it restarts it re-records, you must check the recording timers therefore the recording frequency and keep alive. By default keep alive is disabled.
So before reading a time switch user manual you should read the HT801/802 user manual.