Dedicated voicechannels to usergroups

I would like to have the option to assign a usergroup to one voicechannel only. If a user is starting a call to a contact of this group it would allways the same voicechannel.

Example: I have a taxi company, i want to use only voicechannel A for customers and voicechannel B for my drivers. The drivers know that they allways call voicechannel B, and if a user (dispatcher) want to call a driver he also uses the same voicechannel B. So the driver immidiately recognise the number in his display.

Kind regards

Hans Willems