We have a CS1000 PBX with M390x phones. I need to accommodate an employee with hearing aids (model Oticon Agil Promini Rite). User states he will need a streamer (also by Oticon) to pair directly to a blue tooth adapter which is compatible with our PC and company issued Blackberry environments. How to get this to work with his M3904 is the big question. Because he has extensive outside contacts, he would need to keep his current 4-digit extension. His audiologist said he would need an analog phone that is blue tooth compatible and a single analog line.