The Grandstream HT801 that is repackaged as the Sonic ATA supports a lot of useful features that Sonic prevents its users from accessing. The sonic firmware disables user access to the configuration (why? i don't know! users are perfectly capable of configuring their own hardware and if they screw up they can just reflash a sonic config). Specifically, I need access to the Do Not Disturb mode. Spam callers call in the middle of the night, which is unacceptable. The result is that I just leave the phone disconnected and it is essentially useless because disconnecting/reconnecting every morning (or manually turning on/off DND every morning via the phone menu access) is unreasonable. This feature is built into the HT801 for a reason - please allow us to access it!