1) Thanks for posting your Vicidial Version with Build. Very good.
2) Please remember to include the Full Installer Version (there were several 7.X.X Vicibox .isos). It's useful.
3) Avoid answering your own posts. If no one has commented, just edit your original post instead. Otherwise it looks like someone answered you (and disappears from the "unanswered questions" list, which is what some of us try to keep up so everybody gets at least *some* answer ... but if you answer yourself you could get ignored for quite a while). Just sheer luck I bumped into this one. FYI
4) The Vicidial Manager's Manual covers the creation of a phone in admin->phones with an External Extension. You would do well to use it.
5) Notes on external extensions:
* the asterisk ClI is very useful for troubleshooting when setting up an external extension (asterisk -R)
* the extension must match a carrier dial pattern, including dial prefix
* the dialplan number is NOT required to match the extension in any way. Nor is the voicemail box.
* Remember to wait a minute until the dialplan is reloaded after editing the phone configuration in the GUI. Many have been impatient and continued to make changes without waiting for the reload to occur after a new .conf file is generated by Vicidial, and spent quite a long time trying to troubleshoot as a result.
Happy Hunting! (Welcome to the Party!
)