This Recommendation contains provisions that fix the rules to be followed in the international telex service. The International telex service is a telegraph service for subscribers whereby they can communicate directly and temporarily between themselves using equipment operating at a modulation rate of 50 bauds and presenting a start-stop telegraph interface to the international telex network and employing International Telegraph Alphabet No. 2.The general characteristics of the international telex service are described in Recommendation F.59 which provides a convenient guide to the various Recommendations dealing with the international telex service, including the R-, S- and U-Series Recommendations which deal with matters of an essentially technical nature.