Title :
High-Capacity PCM Transmission Systems for Toll Networks
Author_Institution :
Standard Telecommunication Labs. Ltd.,Harlow,England
fDate :
11/1/1974 12:00:00 AM
Abstract :
High-capacity pulse code modulation (PCM) transmission systems have made little impact despite the availability of suitable technology and the rapid growth of low-capacity systems. It is shown that high-capacity systems can now be introduced into toll telephony networks without short-term economic or compatibility disadvantages and with considerable long-term advantages. A 120Mbits/s coaxial cable system compatible with 12-MHz systems is described in outline.
Keywords :
Economic analysis; FDM systems; PCM systems; Telephone systems; Bandwidth; Coaxial cables; Gaussian noise; Laboratories; Modulation coding; Phase change materials; Phase locked loops; Pulse modulation; Telephony; Working environment noise;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOM.1974.1092115
