Transmission (T)

Transmission Division is responsible for formulation of generic and interface requirements, certification and other activities, in the areas of optical transport and optical fibre cables etc.

Focus Areas:-
  • Optical Fibre Cable
  1. Optical fibre cables (Metal-free and Armoured).
  2. Aerial optical fibre cable (Metal-free and Armoured).
  3. High-count ribbon optical fibre cable (Metal-free and Armoured).
  4. Non-zero dispersion shifted optical fibre cable (Metal-free and Armoured).
  5. Optical fibre cables for FTTx.
  6. Raw materials used in the manufacturing of optical fibre cablesOptical fibre Distribution and Management Systems for Ribbon and Non-Ribbon types of cables.
  7. Optical fibre cable accessories, viz., Optical Fibre Splice Closure, Termination Box, Fibre Distribution Frame, Optical Fibre Jumpers, Installation accessories for aerial optical fibre cable, Installation Tools.


  •  Transport Equipment
  1. PDH Optical line transmission equipment, viz., 34 Mbps and 140 Mbps; 2/34 Mbps and 2/140 Mbps OptimuxSystems and Optical Amplifiers.
  2. 2 Mbps Primary Mux.
  3. SDH family – STM-1/4/16/64.
  4. Cross-connect equipment family – 64 Kb/s, 4/3/1 SDH based, 4/4 SDH based
  5. 40 channel/80 channel DWDM long-haul/very long-haul, and 16/40 channel Metro DWDM systems.
  6. 8 channel CWDM.
  7. Digital Loop Carrier – narrowband/ broadband.
  8. Transmission synchronisation equipment.
  9. Test and Measuring Instruments.
  10. PDH / SDH Analyser, WDM Analyser, DTA, Optical power meter, Optical fibre splicing machines and accessories (Ribbon and Non-Ribbon types), Optical Light Source, Optical Time Domain Reflectometer, Optical Talk Set, Optical Spectrum Analysers, Optical Dispersion Analyser, Ethernet Traffic Analyser.
  11. Setting up of lab for NGN Test-bed for testing and certification for products and networks relating to Optical Transport.
  12. Technology approval to C-DoT for transmission productsPlanning and Maintenance Guidelines for Optical Transport Systems.
  13. Furnishing technical inputs to various other departments and organisations, viz., DoT, BSNL, MTNL, C-DoT, TRAI,; and carrying out technical interactions with ITU, APT, TRAI, TDSAT, DST, DSIR, DIT, TDB, NDMA, BIS and Other Telecom Stakeholders.