The CTR family is based on a common modem unit (MU) with either a VHF/UHF- or an S-Band synthesized RF unit. The CTR-S has a modular sandwiched design with Eurocard 3U sized footprint manufactured in aluminium with Alodine® surface coating. The CTR-S power and communication interfaces are optimized for the Spaceteq standard bus, but are easily customized for any typical satellite bus.