Historical Development

1911

Establishment of Delhi telephones system with manual exchange 

1926

Opening if 1st automatic exchange (Lothian exchange)

1937

Opening of Connaught Place exchange.

1945

First Manual Trunk exchange opened.

1950

Opening of Cantt exchange

1953

Tiz Hazari Exchange (Lothian exchange ceased working) commissioned.

1955

Secretariat exchange commissioned

1958

Karol Bagh exchange (SXS) commissioned.

1961

Jor Bagh exchange (SXS) commissioned.

1961

Shahadara exchange (SXS) commissioned.

1962

Opening of First STC service to Agra.

1963

Delhi Gate (27) exchange commissioned.

1964

Delhi telephone crosses 50,000 lines.

1966 

Opening of exchanges at Nangloi, Narela, Najafgarh, Bahadurgarh and Ballabgarh.

1967

Rajpath (38) exchange commissioned

1968

1st X-Bar exchange (KB58) commissioned. X-Bar exchange (JB62) commissioned

1969

Trunk automatic exchange (TAX) commissioned

1970

Okhla X-Bar exchange commissioned.

1972

Opening of Idgah-I (51) Strowger exchange.

1972

X-Bar (31) Janpath-I exchange commissioned. Delhi telephones crosses 1 lac lines.

1973

Opening of X-Bar (67) Chanakya Puri exchange.

1975

X-Bar Janpath-IV (34) exchange commissioned. X-Bar Shahdara East (20) exchange commissioned. 

1976

Shakti Nagar (74) exchange commissioned. Idgah-II (52) X-Bar exchange inaugurated by Mr. Fakhuriddin Ali Ahmed, President of India, on 28.8.76 and presided over by Mr S.D. Sharma (Minister of Communications).
Opening of Shahdara East (20) Extension-I, X-Bar exchange on 31.8.76. It was inaugurated by Mr H.K.L Bhagat (Minister of State for Works & Housing) and Mr S.D. Sharma (Minister of Communications).
Opening of Hauz Khas (65) X-Bar exchange on 18.10.76. It was inaugurated by Mr S.D. Sharma (Minister of Communications) and presided over by Mr Radha Raman (Chief Executive Councillor, Delhi). 

1977

Opening of STD Service to Indore and Ambala on 5.10.77 by Mr Brij Lal Verma (Minister of Communications).

1978

Opening of Rajouri Garden-I (59) X-Bar exchange in Feb 78
Opening of Hauz Khas -II (66) X-Bar exchange on 15.2.78, by Mr Brij Lal Verma (Minister of Communications).
Opening of Janpath-V (35) X-Bar exchange.
Opening of Nehru Place (68) Strowger exchange on 4.11.78 by Mr Brij Lal Verma (Minister of Communications) and presided over by Mr R.K. Gupta (Mayor of Delhi).

1986

Creation of Mahanagar Telephones Nigam Limited

1986

First digital exchange world technology brought to India

1987

Largle Scale introduction of push button telephone made dialling easier.

1988

Phone Plus services multiplied benefits to telephone users.

1992

Voice Mail Service Introduced

1996

ISDN services introduced

1997

Wireless in Local loop introduced

1999

Internet services introduced.

2000

Millennium Telecom Limited, a wholly owned subsidary of MTNL is born

2001

Launched GSM Cellular Mobile service under the brand name Dolphin
Launched WLL Mobile services under the brand name Garuda.
The company listed at New York stock exchange(NYSE)
United telecom ltd.,MTNL Joint venture in Nepal,for providing WLL based services in Nepal became operational.
CLI based Internet express services introduced.

2002

Launched pre-paid GSM Mobile services under the brand name Trump.Email on PSTN lines introduced under the brand name mtnlmail.

2003

Introduced CDMA 1x 2000 Technology under the brand name Garuda 1-x.Introduced pilot project of ADSL based Broadband services.Introduced Virtual Phone services.Mahanagar Telephone Mauritius Ltd. bagged second operator license in Mauritius.

2004

Expanded GSM & CDMA capacity by 800,000 lines each (total 1.6 million lines expanded) STD/ISD rates slashed by almost 60%. MTNL subsidiary MTML obtained license to provide fixed, mobile & ILD services in Mauritius. Launched Wi-Fi & digital certification services. State of the art training centre ?CETTM? commissioned.

2005

Leading market in GSM customer additions. Launched broadband services under the brand name ?TRI BAND?. Floated tender for 1 million 3G GSM lines.