How to Park a Caller
If you have a Park Button setup on your phone you can press it at anytime while on a call with someone.
The caller will be parked and the slot number will be played back to you where the caller was parked.
Parking is similar to Hold. Parking puts the call in a queue in your system and anyone who has access to that zone can answer the parked call. Putting a call on Hold, is only accessible by your phone.