To park and pick up a call

1. Answer an inbound call.
2. After talking to the caller, press #.
3. You will hear "Transfer".
4. Press the park code. By default, this is *7. You administrator will tell you if this has been changed.
5. Wait for 2 seconds.
6. You will hear a park number, such as 701.
7. Hang up.
8. Call the park number from another telephone.

Note that only inbound calls can be parked. Outbound calls cannot, to allow pressing # to work with external IVRs.