The issue focused mainly on telecommunications operators wanting access to routers running Cisco Router OS firmware versions prior to Version 11. That update introduces 802.11 wireless connectivity capabilities into routers manufactured since 2006. Wireless routers powered by routers shipped between 2002 and 2007 contain router firmware versions newer than Version 11 that enables 802.11 WiFi connectivity without upgrading routers designed before Version 11. Those routers typically operate under WiMAX configurations using IEEE 802.11 protocols such as IEEE 802.15.4 or IEEE 802.16. While routers marketed prior to