India Explained
ImplementedINCRajiv Gandhi

Centre for Development of Telematics (C-DOT) 1984

The government set up C-DOT in August 1984 as an autonomous R&D centre with a 36-month, Rs 36 crore goal to develop digital switching systems, including rural exchanges, in India.

Telecom

Facts

  • C-DOT was established in August 1984 as an autonomous telecom R&D centre of the Department of Telecommunications; sources give 24 or 25 August 1984 [2][3].
  • It is a registered society under the Societies Registration Act, 1860, with registration number S/14839 of 1984 [2].
  • The original goal was to develop a family of digital switching systems within 36 months with a budget of Rs 36 crore [2].
  • Sam Pitroda started it as an autonomous telecom R&D organisation [1].
  • Early products included small rural automatic exchanges (RAX), a 256-line switch, medium-size SBM switches for towns, and higher-capacity main automatic exchanges (MAX) [1].
  • The first indigenous rural digital exchange, a 128-line RAX at Kittur, Karnataka, is dated 22 July 1986 on C-DOT's timeline, while another C-DOT page dates the first digital exchange to 1987 [2].
  • C-DOT technology spread through licensed manufacturers, building an Indian vendor base; it later diversified into optical, satellite, wireless and software products [1].

Why

Reasons given by those who did it

  • An account of the period says India relied on imported telecom equipment that did not suit village conditions and had very low tele-density [4].
  • C-DOT states its original goal as developing digital switching systems within 36 months and Rs 36 crore [2].

Criticism of that reasoning

  • In 2014 Reporters Without Borders listed C-DOT among agencies with a surveillance mandate, and its CMS project was compared to the NSA's PRISM; this concerns a later project [1].

Benefits and concerns

Benefits (2)

  • Developed switching systems designed for Indian rural conditions rather than relying on imports.RAX and SBM products and MAX exchanges [1]; first rural digital exchange installed 1986 or 1987 [2].
  • Built domestic manufacturing capacity through licensed manufacturers.Technology spread across the country through licensees [1].

Concerns (2)

  • The sources reviewed do not give telephone density or call-quality figures before and after C-DOT, so the scale of its effect is not established here.No tele-density figures located in [1][2][4].
  • A later C-DOT project drew surveillance-related criticism.2014 Reporters Without Borders listing of the CMS project [1]. This relates to an institutional extension, not the 1984 mandate.

Evidence points

+11.5
points, mean of two scorers (scale −25 to +25)
+11 to +12
range between the two scorers' totals
Low confidence
scorers agree within 1 point on every criterion
ReachHow many people did the action materially affect?
Mean +3.0A +3B +3
Outcome evidenceDo official or independent data show the intended result (or its opposite), compared with the era baseline and peers?
Mean +2.0A +2B +2
Cost and sustainabilityIs the fiscal cost proportionate, and is the effect durable?
Mean +2.0A +2B +2
Process and rightsWas it made with debate, consultation and legal soundness, and did it respect rights and court rulings?
Mean +1.5A +2B +1
DeliveryWas it implemented as announced, on time and at scale?
Mean +3.0A +3B +3

Positive meanNegative meanScorer AScorer B

Scorer A. Indigenous rural digital exchanges and a licensed vendor base were delivered, but the file gives no tele-density figures to show scale of effect.

Scorer B. Indigenous digital exchanges and licensed manufacturing built domestically, though tele-density effect not quantified in sources.

Context used when scoring

Era baseline
In 1984 India depended largely on imported electromechanical and early electronic exchanges, and telephone density was among the lowest of large economies.
Lag before outcomes show
5 years
Uncertainty
Low confidence. Scorer totals are +12 and +11. How uncertainty is shown.

In depth

C-DOT was set up in August 1984 as a society under the Department of Telecommunications. Sam Pitroda returned from the United States to lead it. The organisation’s stated aim was to develop digital switching technology in India within 36 months and Rs 36 crore.

Its best-known early product was the rural automatic exchange (RAX), followed by medium-size switches for towns and higher-capacity main exchanges. C-DOT transferred its designs to licensed manufacturers, who built the equipment. Wikipedia credits the rural telecom expansion with social and economic development, while noting that the sources do not give quantified before-and-after figures.

C-DOT’s timeline and another C-DOT page differ on whether the first indigenous digital exchange was installed in 1986 or 1987. The claim that it caused a rise in telephone density, or the rise in public call offices, is stated in secondary accounts but was not verified with data. Confidence is therefore low, and the entry should be read as a description of institutional creation rather than a measured outcome.

Sources

  2. Journey (C-DOT timeline)
    Centre for Development of TelematicsPrimary

Last reviewed .Report an error orchallenge a score.

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