| Reliance Infocomm |
Bharti Televentures |
| British Gas
Ltd |
Tata Telecomm |
| VSNL |
Spice Telecom |
| Aircel Digilink
India Limited |
Teleglobe Inc. |
| Shivam Infocom Private Limited |
H. F. C. L Infotel Limited |
| Birla AT & T Communications Limited |
Ortel Communications
Limited |
| Sprint R. P.
G India Limited, Delhi |
G. T. L. Limited,
Bangalore |
| Touchtel |
I-Net, Chennai |
| Tele Net Engineers |
R. P. G. Paging Services Limited |
| Hcl-bpo |
GE |
| IBM |
Daksh |
| Larsen & Toubro Limited |
BSES |
| Telecommunication Consultants India Limited |
I. T. I. Limited, Bangalore |
| Sify Limited |
Toshiba Electrical Works |
| Nokia |
Samsung |
| U. T. Starcom, Inc. |
Net 4 India Limited |
| Data Access |
Estel Communications Private Limited |
| Huges Sattelite |
Gilat Communications |