... Protocol Converter extends Ethernet through telecommunication line( E1 or network carrying E1, such as PDH, SDH, micro-wave, etc 4E1 to Ethernet ... Protocol ConverterE1-10/100Base-TX Protocol Converter is the equipment that extends Ethernet through telecom- line( ... , CSAConsumptionCard type (full-loaded)≤ 60WStandalone type≤ 5W. 4E1 to Ethernet Protocol Converter