TEL-STER company has in its offer TelCOMM software (currently it is available in version 5.0). TelCOMM software is a tool designed for B2B exchange of documents using protocol AS4 and AS2, the implementation of which at gas counterparties market results from the European Commission Regulation (EU) 2015/703 from 30 April 2015 which establishes a network code being a principle of interoperability and data exchange.