If you are dialing my GC office phone number from a site with One Voice enabled the call will be ‘On Net’ which mean that the call is transferred over GWAN network end to end. This call has no charge. But you are paying for GWAN and I am also paying for GWAN.
Offshore employee mobile number will work like an Off Net call I described in the above question. There is a standard Off Net call charge for India market per minute.