generate questions: In 1881, Tesla moved to Budapest to work under Ferenc Puskás at a telegraph company, the Budapest Telephone Exchange. Upon arrival, Tesla realized that the company, then under construction, was not functional, so he worked as a draftsman in the Central Telegraph Office instead. Within a few months, the Budapest Telephone Exchange became functional and Tesla was allocated the chief electrician position. During his employment, Tesla made many improvements to the Central Station equipment and claimed to have perfected a telephone repeater or amplifier, which was never patented nor publicly described.
Where did Tesla move in 1881? {sep_token} Which company did Tesla work for in 1881? {sep_token} What position did Tesla accept at the exchange? {sep_token} What did Tesla claim to perfect while at the exchange? {sep_token} What position did Tesla hold in the Central Telegraph Office? {sep_token} In what year did Tesla go to Budapest? {sep_token} Where did Tesla work in Budapest? {sep_token} What was the name of the telegraph company Tesla returned to after it became functional? {sep_token} What was Tesla's position at the Budapest Telephone Exchange? {sep_token}