I have a customer that is going from a Samsung officeserv telephone systems to a S20. The customer has 3 outside sales reps. and they only have virtual extensions on the Samsung. They can Transfer the call to there Ext. on the Samsung and it will ring there Cell phone and If they dont answer it will go there mailbox on the Samsung system. Is there a way to add users to the S20 that dont't have a registered phone on the system. I want to set up remote user on the S20 but they dont need a telephone they just want to us there cell phones.