| 379 / | HD | TELEPHONIC COMMUNICATIONS |
| 143 | DF | WITH CHECK OPERATED CONTROL (E.G., PAYSTATION) {5} |
| 146 | DF | .~ Coin signalling or control {4} |
| 150 | ![]() | .~.~ Coin disposition (i.e., return or collection) {3} |
| 151 | DF | .~.~.~> Upon connection to called station |
| 152 | DF | .~.~.~> Magnet, electromagnet, or relay controlled from central office |
| 153 | DF | .~.~.~> Paystation (e.g., controlled by refund key) |