WiMAX stands for Worldwide Interoperability for Microwave Access and is a unique technology being deployed by BSNL as Wireless Broadband Services for the first time in India. This technology provides fixed as well as fully mobile high speed broadband connectivity along with roaming feature. It provides users a thrilling Internet browsing experience.
BSNL offers three types of variety of Customer Premises Equipments (CPEs) as Outdoor, Indoor and USB dongle from which customers can choose as per their application requirements.

Indoor Equipment :- Best suited for Home/Office users and it can be used in moving vehicle also.

Dongle Equipment :- Small Dongle can be connected directly to PC / Laptop via USB port, and here is your WiMAX USB Dongle Configuration Settings

Outdoor Equipment :- Suitable for remote and rural areas which can be used up to 15 Kilometers distance (Line of sight) from BTS site.
Courtesy: http://www.bsnlteleservices.com