On a Nortel ICS, if a call is transfered to a station in use, or in DND, the transfered call is sent back to the station that origonally transfered the call. IE: Station 101 transfers call to station 108, if 108 is in use or in DND it is sent back to 101. The VM unit is a Call Pilot 150. Currently all stations on this system are set for No Answer trans to VM.