Does the Cisco Unified Wireless IP Phone 7920 support Layer 2 roaming with active calls?
A. Yes, a Cisco Unified Wireless IP Phone 7920 IP Phone can maintain an active call when roaming between access points that have coverage for a single Layer 2 subnet, but calls are dropped when the phone roams into the access point coverage for another Layer 2 network. When the Cisco Unified Wireless IP Phone 7920 roams into a different Layer 2 network, it drops the active call and then goes through the process of authenticating, associating, and obtaining a new IP address before it can register with the Cisco Unified Communications Manager server again.
