Télécartes.com
Télécartes.info
Télécarte.info
French: Telephone Card/Calling Card
Google: about 390,000 French pages for "Télécartes".
http://fr.wikipedia.org/wiki/T%C3%A9l%C3%A9carte
http://en.wikipedia.org/wiki/Telephone_card
Most public telephones in France accept only phone cards (télécartes). These are widely available at tobacconists, post offices, and newsstands. Otherwise, bars have coin phones that tend to eat up your money rather quickly and give no change.
(From
http://www.weather.com/outlook/trave...c_cityoverview)