The external call transfer – is the call transfer to a telephone line other than the company’s telephone line. The internal call transfer – the transfer of an incoming call to another addressee registered on the same telephone line.
Notification about the incoming calls, addressed to your land line or
office phone, coming to your cell phone. For instance, if you had a call to the
office at the moment when you were unavailable, a notification about the missed
call will come to your mobile phone.