UNE-EN 50289-1-11:2002 Communication cables - Specifications for test methods -- Part 1-11: Electrical test methods - Characteristic impedance, input impedance, return loss.
2017UNE-EN 50289-1-11:2017 Communication cables - Specifications for test methods - Part 1-11: Electrical test methods - Characteristic impedance, input impedance, return loss
2002UNE-EN 50289-1-11:2002 Communication cables - Specifications for test methods -- Part 1-11: Electrical test methods - Characteristic impedance, input impedance, return loss.