One of customer was asking to design a network for his office and business he was having 5 locations as braches each location was having 10-20 km distance. Now he want latest wimax network to be implemented for business and employees. He want to give access to his employees even in home with wireless usb modem (pen drive size) like TATA WIMAX, Reliance WIMAX, Airtel Wimax usb modem but not on SIM based. He was having plans to start ISP business further in 6 months or 1year for 1000 customers. hence please let us know architecture and design which routers, swicthes to be used.