Full duplex STM-1 electrical SDH transport over coaxial cables at 155 Mbit/s and is fully interchangeable with STM-1 optical SFP modules. Compliant with telecom ITU-T G.703 and can be connected using standard DIN 1.0/2.3 75-ohm cable. Suited for SDH add/drop multiplexers, optical edge devices, MSPP, and switching systems.