| 370 / | HD | MULTIPLEX COMMUNICATIONS |
|
| FOR 135 |  | TIME DIVISION (370/77) {14} |
| FOR 136 | DF | .~> Polarity multiplex (370/78) |
| FOR 137 | DF | .~> Adaptive systems (370/79) {4} |
| FOR 143 | DF | .~> Bus transmission (370/85.1) {5} |
| FOR 157 | DF | .~> Asynchronous and nonsynchronous (370/91) {1} |
| FOR 163 | DF | .~> Variable channel assignment (370/95.1) {2} |
| FOR 166 | DF | .~> TDM pulse repeater (370/97) |
| FOR 167 | DF | .~> Pilot (370/98) |
| FOR 168 | DF | .~> Byte assembly and formatting (370/99) |
| FOR 169 | DF | .~> Synchronizing (370/100.1) {13} |
| FOR 183 | DF | .~> Time compression or expansion (370/109) |
| FOR 184 | DF | .~> Signalling (ancilliary to main information) (370/110.1) {4} |
| FOR 189 | DF | .~> Multiplexers/distributors (hierarchy and level) (370/112) {3} |
| FOR 193 | DF | .~> Staircase wave (370/116) |
| FOR 194 | DF | .~> Magnetic core for switching or storage (370/117) |