Features > Call Parking
If your colleague is on the phone when a caller is looking to speak to them, a transfer will end up with the caller leaving a voicemail. If the call is important, call park them until your colleague is free to pick up the call.
Call parking allows a user to place a caller on hold at one handset and for the conversation to be continued at another.
Set up multiple ‘parking lots’ so that each of your departments has a dedicated call parking number.