Equip any desktop to have greater traffic control and traffic management with the Bext C expansion module. It is a powerful tool for companies with high volume of traffic in calls, with a screen of 4.3 "and 16 keys programmable for Speed Dial The module itself is intuitive and easy to use, optimized call control and flexibility in operation Compatible with Voce V3 and Voce V4 IP telephones is capable of handling up to 90 extensions in total Its easy installation Plug & Play Will allow you to start immediately, improving the productivity and efficiency of communication managers in your company.