Setting up FreeDigits on my Trixbox
Add a SIP Trunk. Don't put anything in the Outgoing Dial Rules.
In the Outgoing Settings / Trunk Name put in FreeDigits. Enter the following into the PEER Details. Incoming Settings is not required.
The registration string that works for me is:
I tried it without the phone number at the end of the string but it didn't work.
Now for the Inbound Route
On the left, click on the Inbound Routes. Enter your number in the DID Number box.
Down near the bottom of the page you set the destination where the calls are going. Have it go to an extension, a ring group, a recording, or the conference.