1. Bharti Teletech Ltd., Ludhiana     2. Bharti Teletech Ltd., Goa     3. BEL, Kotdwara.     4. HFCL, Solan.     5. ITI's, Bangalore, Rae-Barelli, Mankapur.     6. Instrumentation Ltd., Kota.     7. SRV Telecom, Bangalore.     8. Priyaraja, Bangalore.