@giqcass
I haven't put any thought into this, however the following might provide some leads. These are native OBi methods to bargein or conference a call. It might be possible to leverege this into a inbound call route.
Macro (Star Codes in the OBi unit-all OBi models)
*96, Barge In, set($Bar1,1)
Latest Update for OBi1 Series - OBi2 and OBi3 Series
http://www.obitalk.com/forum/index.php?topic=9.0"Enhancements & Fixes in Maintenance Release 1.2.1 (2384):
- Touch-tone entry improvement when accessing a conference call bridge, entering credit card numbers, etc.
Support external conference bridge, with the new UseExternalConferenceBridge option"
I believe the UseExternalConferenceBridge option is not available in the OBi1xx.