1. corDECT Wireless Access System
An Indian way to Wireless Revolution

2. Why corDECT ?
Cost of setting up traditional copper based telephone networks very high
Developing countries like India will require 35-million pair kilometers of copper cable to maintain existing waiting lists.

3. Why corDECT ? The cost of Copper Increasing
Wireless reduces the cost of Access part of network which consists of 70% of total costs
Still cost of setting up Base stations and their controllers very high

4. Why corDECT ?
Eliminates the physical connections between telephone exchanges and subscribers
Has a simple technology structure, easier to implement, supports large number of subscribers
Costs less than traditional Wireless Structure used by Mobile Operators

5. The Torch Bearers Indian Institute of Technology, Madras,
Midas Communication Technologies, Madras,
US semiconductor manufacturer Analog Devices Inc.

6. The Technology
Based on the Digital Enhanced Cordless Telecommunication (DECT) Standard
Built around a micro cellular architecture
corDECT micro cell could be as small as 250-meters.

7. The DECT Standard Defines the air interface for users.
Specifies the interface between the subscriber terminal and the base stations.
DECT/GSM,DECT/ISDN and DECT/PSTN inter networking profiles

8. The DECT Standard The DECT frequency band is 1880-1900MHz.
The standard uses 32kbps ADPCM (Adaptive Differential Pulse Code Modulation)

9. Channel structure corDECT
20 MHz
24 Channels
12 forward channels
12 reverse channels

10. Architecture And Components
DECT Interface Unit (DIU),
compact base stations (CBS),
subscriber access units

11. DECT Interface Unit
ADPCM switch that serves as an interface between the public switch telephone network and the CBS.
Each DIU is connected to a maximum of 20 CBS and each CBS
Courtesy:

12. Compact Base Station
The CBS is a small, pole-mounted or wall-mounted electronic unit that provides 12 simultaneous speech channels.
Serves cell upto meters
Each line can carry four ADPCM speech channels and one channel of 16kbps signaling

13. The Subscriber Unit
Subscriber Unit for looks for access to strongest base channel
Locks to the quietest of the available 12 channels
Ensures Interference free Communication
Encryption Protects from Eaves Dropping

14. The Subscriber Unit
The handset is a small, portable battery operated unit that allows subscribers limited mobility at pedestrian speed. Can be operated upto 200m from CBS
The subscriber can have access to any CBS connected to one DIU.
A wallset can be used three-kilometers from a CBS

15. Conclusion
The corDECT wireless local loop system offers relatively low cost and rapid installation of telecom services in areas with even high subscriber density environments.
Good Market in developing Countries like India, Russia, China etc.
Good for highly dense urban areas