I have a few suggestions that I would like to see in the future:
1. Adding the option for incoming sip uri. calls with the option of enable/disable from the websites appSetting.
2. Adding the Blacklist feature to the website, same as the desktop app.
3. Registering up to two devices (ata & softphone and hopefully a mobile app).
4. Desktop app ability to call sip addresses.
5. The ability to send faxes either on the website or the desktop app.