System Requirements
AirPort Extreme and AirPort Time Capsule base stations with 802.11ac
Firmware update 7.7.2 is for AirPort Extreme and AirPort Time Capsule base stations with 802.11ac.
This update:
▪ Addresses an issue that prevents a USB hard drive connected to an AirPort Extreme from appearing as an available disk in Time Machine
▪ Resolves an issue that may intermittently cause a loss in WAN connectivity
▪ Resolves an issue that may result in a network loop
All about AirPort Time Capsule, AirPort Extreme, and AirPort Express base station firmware updates
http://support.apple.com/kb/HT1218For more information on using AirPort products, go to the Product Support Page at:
http://www.apple.com/support/airport/