General Characteristics Recommended for Systems Providing 12 Telephone Carrier Circuits on a Symmetric Cable Pair ((12 + 12) Systems) - International Analogue Carrier Systems (Study Group XV) 5 pp
General Characteristics Recommended for Systems Providing 12 Telephone Carrier Circuits on a Symmetric Cable Pair ((12 + 12) Systems) - International Analogue Carrier Systems (Study Group XV) 5 pp