... 1 to 4 E1 channels to Ethernet interface. This convertor provide conversion from 1 to 4 E1 channels to ... inch 1U high4E1-ETH /19/AC/ALL4E1-ETH interface convertor,75Ω,120Ω,220V,19 inch 1U high4E1-ETH /19 ... /DC/48/ALL4E1-ETH interface convertor,75Ω,120Ω,DC-48V,19 inch 1U high4E1-ETH ... /19/DC/24/ALL4E1-ETH interface convertor,75Ω,120Ω,DC+24V,19 inch 1U highpackaging content: ...