Sources:
http://en.wikipedia.org/wiki/Moscow-Washington_hotline
http://www.state.gov/t/isn/4785.htm
http://www.independent.co.uk/news/world/asia/india-and-pakistan-to-have-nuclear-hotline-732980.html
The phone was referenced in Hillary Clinton’s campaign ads.
On June 20, 1963 the USA and USSR agreed to establish a permanent telegraph connection between the leaders of the two countries.
The goal was to increase communication during times of nuclear brinkmanship.
On June 20,2004 India and Pakistan established a similar communication system to help with their nuclear conflict.



