corDECT is a

wireless local loop Wireless local loop (WLL), is the use of a wireless communications link as the "last mile / first mile" connection for delivering plain old telephone service (POTS) or Internet access (marketed under the term "broadband") to telecommunications cu ...

standard developed in

India India, officially the Republic of India ( Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the ...

IIT Madras Indian Institute of Technology Madras (IIT Madras) is a public technical university located in Chennai, Tamil Nadu, India. As one of the Indian Institutes of Technology (IITs), it is recognized as an Institute of National Importance and has ...

and Midas Communications (www.midascomms.com) at

Chennai Chennai (, ), formerly known as Madras ( the official name until 1996), is the capital city of Tamil Nadu, the southernmost Indian state. The largest city of the state in area and population, Chennai is located on the Coromandel Coast of ...

, under leadership of Prof

Ashok Jhunjhunwala Ashok Jhunjhunwala (born 22 June 1953) is an Indian academic. He received his B.Tech. (Electrical Engineering) from the Indian Institute of Technology, Kanpur and PhD from the University of Maine. He has been a faculty member at the Indian ...

, based on the

DECT Digital enhanced cordless telecommunications (Digital European cordless telecommunications), usually known by the acronym DECT, is a standard primarily used for creating cordless telephone systems. It originated in Europe, where it is the common ...

digital Digital usually refers to something using discrete digits, often binary digits. Technology and computing Hardware *Digital electronics, electronic circuits which operate using digital signals **Digital camera, which captures and stores digital i ...

cordless phone A cordless telephone or portable telephone has a portable telephone handset that connects by radio to a base station connected to the public telephone network. The operational range is limited, usually to the same building or within some sho ...

standard.Huffman, B. (2002). ''Building a Wireless Bridge over the Digital Divide''. UNCRD Regional Development Dialogue, 23(2), 137-154.

Overview

The technology is a

Fixed Wireless Fixed wireless is the operation of wireless communication devices or systems used to connect two fixed locations (e.g., building to building or tower to building) with a radio or other wireless link, such as laser bridge. Usually, fixed wireles ...

Option, which has extremely low capital costs and is ideal for small start ups to scale, as well as for sparse

rural In general, a rural area or a countryside is a geographic area that is located outside towns and cities. Typical rural areas have a low population density and small settlements. Agricultural areas and areas with forestry typically are descri ...

areas. It is very suitable for ICT4D projects and India has one such organization, n-Logue Communications that has aptly done this. The full form of DECT is

Digital Enhanced Cordless Telecommunications Digital enhanced cordless telecommunications (Digital European cordless telecommunications), usually known by the acronym DECT, is a standard primarily used for creating cordless telephone systems. It originated in Europe, where it is the commo ...

, which is useful in designing small capacity WLL (wireless in local loop) systems. These systems are operative only on LOS Conditions and are very much affected by weather conditions. System is designed for rural and sub urban areas where subscriber density is medium or low. "corDECT" system provides simultaneous voice and Internet access. Following are the main parts of the system. DECT Interface Unit (DIU)
This is a 1000 line exchange provides E1 interface to the PSTN. This can cater up to 20 base stations. These base stations are interfaced through ISDN link which carries signals and power feed for the base stations even up to 3 km. Compact Base Station (CBS)
This is the radio fixed part of the DECT wireless local loop. CBSs are typically mounted on a tower top which can cater up to 50 subscribers with 0.1 erlang traffic. Base Station Distributor (BSD)
This is a traffic aggregator used to extend the range of the wireless local-loop where 4 CBS can be connected to this. Relay Base Station (RBS) This another technique used to extend the range of the corDECT wireless local loop up to 25 km by a radio chain. Fixed Remote Station (FRS)
This is the subscriber-end equipment used the corDECT wireless local loop which provides standard telephone instrument and Internet access up to 70kbit/s through Ethernet port. The new generation corDECT technology is called

Broadband corDECT In telecommunications, broadband is wide bandwidth data transmission which transports multiple signals at a wide range of frequencies and Internet traffic types, that enables messages to be sent simultaneously, used in fast internet connections. ...

which supports provides broadband Internet access over wireless local loop.

References

* Rahman, S. & Pipattanasomporn, M. (2002). Alternate technologies for telecommunications and internet access in remote locations. In Proceedings of the Third Mediterranean Conference and Exhibition on Power Generation, Transmission, Distribution and Energy Conversion, November 2002, Athens Greece

*Huffman, B. (2002). ''Building a Wireless Bridge over the Digital Divide''. UNCRD Regional Development Dialogue, 23(2), 137-154.
Midas Communications
Local loop Broadband {{wireless-stub

Overview

See also

References