Coexistence of 50 Baud/ 120-Hz Channels, 100-Baud/240-Hz Channels, 200-Baud/ 360-Hz or 480-Hz Channels on the Same Voice-Frequency Telegraph System - Telegraph Transmission (Study Group IX) 3 pp
In this Recommendation frequency-modulated voice-frequency telegraph (FMVFT) equipment
with and without crystal control are distinguished. In order to improve the quality of transmission and to
minimize maintenance costs, the application of equipment wi