3CX Phone System offers the ability to park a call and for that call to be picked up from another extension.

To park a call:

BLIND Transfer Button followed by *00 to 09 to specify the parking orbit.
For example *01 will place the call in the parking orbit 1.
*02 will place the call in the parking orbit 2.

To pick up a parked call:

*10 to 19 where the 0 – 9 is the park orbit number
For example *11 will pick up any calls parked in parking orbit 1
*12 will pick up any calls parked in parking orbit 2

Multiple Calls in Parking Lots

Parking lots support parking of multiple calls. Therefore, when un-parking, you can add the extension number from which the call was parked to be sure that you un-park the particular call you had initially parked there.
For example, if extension 100 parked a call in park 0, this call can be picked up by extension 101 by dialling *10100

Examples for Popular IP Phones

Some examples to park a call with popular phones:
Snom – press the TRANSFER button and dial *00
Polycom – press the TRANSFER button, from the screen, then choose the option BLIND and then dial *00
Cisco – choose “More” option on the screen, choose BlndXfr and dial *00

Note: Call Pickup and Call Park are only available in commercial editions of the 3CX Phone System.