I know that some people had issues activating or deactivating which required a reboot of the ATA to remedy. Any change made to the ATA requires a reboot to finalize. I suspect some of the people with this issue may be more susceptible to this than others. I think this because I see the same people report manual rebooting each time.
Basically, our server sends a request to the ATA to force it to reboot. Either the ATA is not getting that request OR the ATA thinks the phone is off-hook which will pause the reboot until the phone goes back on-hook. Not sure which is happening
If you are one of the people who had to manually reboot the ATA, please do me a favor and let your ATA sit overnight and then try to call it. Let me know if it rings. I want to see if your ATA times out. Others can test this too as a control.