Seems simple enough to me, except you need to take another look at the following excerpts from the TOS to be sure you want them like this..

======VOIPo provides all residential customers with a telephone adapter and softphone solution to use to connect to our service. The use of any other third party devices (such as ATAs) or software (such as Asterisk) is strictly prohibited. Users who attempt to circumvent this restriction face immediate termination of their service. VOIPo reserves the right to remotely access and manage provided devices.

======VOIPo provides support for using our service and provided hardware only. We do not provide troubleshooting or support for routers, computers or internet connections. The provided phone adapter has a built in router is designed to be connected directly to a modem and then your existing router or computer connected to the built in router. If you connect the VOIPo adapter to an existing router, we cannot provide troubleshooting for your router if service does not work properly.