Bavaria's first public telegraph line, running from Munich to Salzburg, was opened in 1850. In the same year, Munich was connected to 10 other Bavarian cities. The Morse code writers were provided by Siemens & Halske and complied with the Prussian machines that Siemens had redesigned based on the designs of Charles and William Robinson. The later machines were built by the Royal Bavarian Telegraph Workshop in Munich using the Siemens model.