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 and is explained here.
Call Parking Usage
While the CP925/965/935W telephones are designed for call conferencing, you can also use them to receive and park calls.
When you park a call, it is placed on hold and you can retrieve it from another telephone in your office.
Call parking is also useful when a call needs 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.
You can park a call to a shared parking. With this feature, the system essentially automatically picks an available parking slot extension and parks your call there. Verify with your phone system administrator that this mode is enabled on your phone.
To park a call in the shared parking, during a call tap 
>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.
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 Using a DSS Key
You can configure DSS keys to quickly park a call against a pre-selected parking slot extension. The DSS key icon also provides a status indication about the parking operation.
To configure a DSS key to park or retrieve a call:
- Tap
on the bottom of the idle screen. - Long tap the desired line key you want to configure.
- Select Key Event from the Type field.
- To configure the key to park a call, select Call Park from the Key Type field.
To configure the key to retrieve a call, select Retrieve Park from the Key Type field. - (Optional.) Select the desired line from the Account ID field.
- (Optional.) In the Label field, enter a string to identify the park/retrieve key and target extension.
- In the Value field, enter the target parking slot extension where the call is to be parked on.
- Tap
to finish the configuration.
The park key can also be configurable via the web user interface at the path DSSKey>Line Key.
Using the Park DSS Keys
During a call simply tap 
>Dsskey and select the DSS park key configured above, to park the call against the specific extension associated with the key.
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 and the DSS key icon will indicate a "Park failed" state (see next). If this happens, you can try to park the call in the shared parking lot instead.
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.
Park/Retrieve Keys State Indicators
The icon and color of the park key changes to indicate the state of the parking operation. It also shows the availability of the target extension (idle or ringing).
