Subscriber trunk dialling

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Typical signboards of STD booths (kiosks from where STD calls can be made) in India

Subscriber trunk dialling (STD, also known as subscriber toll dialling) is a term for a telephone system allowing subscribers to dial trunk calls without operator assistance.

• See also: Wikipedia

• Related: Trunk prefix, Telephone numbers in India

STD codes in India STD codes in India www.bsnl.co.in/viewstatecode.php - Web

The archives of BT including archives of its prede... The archives of BT including archives of its predecessor organizations www.btplc.com/.../Eventsintelecommunicationshistory.htm - Web

Archive news article from the BBC on the introduct... Archive news article from the BBC on the introduction of Subscriber Trunk Dialing. news.bbc.co.uk/.../2510289.stm - Web

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BBC video of first call taking place BBC video of first call taking place news.bbc.co.uk/1/hi/uk/7766631.stm - Web

Find All India STD Codes Find All India STD Codes www.std-codes.in - Web

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