NEXUSAGE is free to download and free to use for life.

NEXUSAGE uses the FRC service and includes 1 free remote concurrent call. This allows all your local SIP PBX extensions to register from outside your network at the same time, regardless of how many SIP extensions you have; the only limitation is that just one remote concurrent call is free.

This free remote concurrent call is provided for testing and to prove that everything works correctly, with no connectivity or voice quality issues.

If you want to increase the number of remote concurrent calls, you can subscribe to one of the paid FRC plans, which provide from 4 up to 64 remote concurrent calls, starting at $99 per year.