The following phones are the only models that work with Phonebooth OnDemand currently. If you are providing your own IP-phones please pay attention to the Current Firmware Version, your phone(s) must be within two (2) release versions of our current version in order for us to support them. In order for a phone to configure with us, its firmware must support HTTP/HTTPS. If you are unsure of any of these requirements, please talk with your IP-phone manufacturer.