Calls from any IP, PBX, or PSTN phone can be parked.

Note:
Only audio calls can be parked. Instant messages and conferences cannot be parked.

The following clients can use Call Park to park calls:

• Microsoft Communicator "14"
  
  
• Microsoft Communications Server 2010 Attendant
  
  
• Microsoft Communicator “14” Phone Edition
  
  

Note:
Mobile phones cannot use Call Park to park calls.

Orbit ranges are configured as blocks of virtual extensions (extensions without an assigned user or phone). When you configure orbits as virtual extensions, mobile phones and PSTN phones cannot retrieve parked calls.

Federated users cannot retrieve parked calls.

The following clients can retrieve calls that are parked on Call Park:

• Communicator "14"
  
  
• Microsoft Office Communicator 2007 R2
  
  
• Communications Server 2010 Attendant
  
  
• Microsoft Office Communications Server 2007 R2 Attendant
  
  
• Microsoft Communicator “14” Phone Edition
  
  
• Microsoft Office Communicator 2007 R2 Phone Edition
  
  
• IP common area phones
  
  
• Non-IP phones that are connected to the Communications Server 2010 infrastructure, including common area phones and private branch exchange (PBX) phones