CCITT Rec. M.1300 (11/1988) – INTERNATIONAL DATA TRANSMISSION SYSTEMS OPERATING AT 2400 bit/s AND ABOVE
1 General description
2 Data transmission link control and sub-control stations
3 Reserve arrangements
4 Designations
5 Line-up and maintenance of data transmission systems and links operating in the range 48 kbit/s and above
6 Line-up and maintenance of data transmission systems and links operating in the range 2.4 kbit/s to 14.4 kbit/s
Reference