Before call parking can be used on your phone, some system extensions need to be assigned as parking slots. This is handled by an administrator in the Admin Center as explained here.
Call Parking Usage
You can use call parking to place a call on hold, and then retrieve it from another office location.
Call parking is also useful when a call has to be transferred to a user who is not at his desk. A receptionist can accept the call, park it, and use the office overhead paging system to inform the user about the extension where the call is waiting for him. The user can then use any nearby phone to retrieve it.
If a parked call is not retrieved within a certain time period it will be returned to the phone line that parked it.
Transfer Mode Parking
You can park a call to the shared parking lot using a blind transfer. Verify with your phone system administrator that this mode is enabled on your phone.
To do so, during a call, select Park (you may need to select More>Park). The call will be transferred to the shared parking lot and the system will provide a retrieval code (the number of the parking slot) if the call is parked successfully.
The call will be transferred to the shared parking lot. Essentially, the system automatically picks an available parking slot extension and parks your call there.
Retrieving a Parked Call in Transfer Mode
To retrieve the call dial the parking slot extension it was parked on. You can also select Retrieve on any phone on the same local network (you may need to select More>Retrieve) and, if requested, enter the retrieval code provided when you parked the call.
Parking a Call with a DSS Park Key
You can configure a DSS call park key to park calls with a press of a button to a specific parking slot extension.
To configure a DSS call park key:
- On the phone navigate to Menu>Features>DSS Keys.
- Select the desired line key to use.
- Press
or 
or the Switch soft key to select Key Event from the Type field. - Press
or 
or the Switch soft key to select Call Park from the Key Type field. - Press
or 
or the Switch soft key to select the desired line from the Account ID field. - (Optional.) Enter the string that will appear on the screen when parking is performed in the Label field.
- Enter the parking slot extension number you want to park the call to in the Value field.
- Press the Save soft key.
To park a call simply press the DSS key you configured. The call will be parked to the parking slot entered in the Value field (the system will confirm this slot number if parking is successful).
If a call is already parked on the configured parking slot you will hear a busy tone or a system message saying the parking attempt failed. If this happens, you can try to park the call using the Transfer Mode.
To retrieve the call dial the parking slot extension it was parked on. You can also select Retrieve on any phone on the same local network (you may need to select More>Retrieve) and, if requested, enter the retrieval code provided when you parked the call.