Voice mail S/W?..

Hi ,

My boss wants some voice mail system on his PC , which should respond the incoming telephone calls , should record the incoming message and should greet the caller .He has one multimedia PC with voice modem and dedicated telephone line.We have tried more voice mail softwae but we found that they were not user friendly , so any body please suggest some software which should be user friendly and should support indian telephone condition.Suggest the website also.

Regards
Siva