Current network technology is based on the corDECT
system that was jointly developed by the TeNet group at IIT Madras,
Analog Devices Inc, and Midas Communication Technologies
Pvt. Ltd., Chennai, India.
corDECT provides cost-effective, simultaneous high-quality
voice and data connectivity in both urban and rural areas,
with increased capacity, low blocking rate and seamless
switchover of calls. Using Multi-Carrier Time Division
Multiple Access (MC-TDMA) protocol, 32 Kbps ADPCM voice
communication and Internet connectivity at 35/70 Kbps
can be acchieved to roughly 1000 subscribers per basic
unit. For how corDECT works please refer to the IIT
Madras TeNet corDECT site.
A corDECT access center is located roughly 25 kilometers
from the kiosks. Optional relay base stations are located approximately
10 kilometers from kiosk village information centers or 15km from the Access Centre.
The Access Center through its Rural Group DID-EPABX
(Direct Inward Dialing EPABX) interfaces to:
The village information centers (TeleKiosks) are fixed wireless
stations that consist of:
- E1 (2.048 Mbps) lines
- DIU (DECT Interface Unit)
- Antenna and network interface
- Telephone handsets
- Power supplies
- Software suite including Tamil office tools, communiction applications, etc.
- Speakers, microphone, and web camera