Leissner Data is one of the oldest IT companies in Sweden and has delivered innovative communication solutions for operators and organizations since 1969.

Over the years, Leissner Data has become a renowned company in the industry for their expertise and contributed to a number of standards, innovations in IP and telecommunications.

Leissner Data is delivering solutions under the name Plextone®. The Plextone® product family includes an Operator Switch, Home Location Register and GGSN/PWG. Leissner Data also offers systems for billing, number porting, number management and SMSC to make a complete operator software suit.