Cisco WBPN Wireless-N Bridge for Phone Adapters - Retail Packaging - Silver The bridge supports standards-based 802.11n wireless networking, providing better coverage and superior bandwidth. Advanced (QoS) features help ensure crystal-clear voice communication. With the Cisco SPA Bridge, you can easily add new extensions or move phones between offices, conference rooms, lobbies, or other environments - without expensive network wiring. The solution lets you extend your phone system using your existing wireless network, while providing the mobility, flexibility, and agility you need to meet changing needs in a dynamic environment.