Which is the best way to configure Cisco Emergency Responder (CER) for Cisco Unified Wireless IP Phone 7920?
A. The best way is to configure IP Subnet-based ERLs. Cisco Emergency Responder cannot locate or track 802.11b wireless endpoints. The recommended method is to configure a subnet-ERL for each access point, also identify the switch port to which the access point is connected and assign the 802.11b wireless endpoint to the subnet ERL that is configured for that access point. For more information, refer to Configuring IP Subnet-based ERLs.