The history of card-based telephony in this West African country is not very long. Phones provided by Landis & Gyr were installed in 1988, and the first cards were issued. These were the classic optical band cards of the time: with the one-color (yellow) paint-like print, the series included four values: 10, 20, 50 and 100 taxes, all with code 812E. The short run (2,000 each the first two values, only 1,000 for the 50 and 100) and the difficult political situation in the country has made these cards not very easy to find. The four values were then reprinted in 1992 and 1994, but the printing system was not the same and the cards were orange instead of yellow. The Landis & Gyr telephone system was discontinued in 2000 and no longer replaced.