| 379 / | HD | TELEPHONIC COMMUNICATIONS |
| 201 | DF | SPECIAL SERVICES {9} |
| 210 | ![]() | .~ Call diversion (e.g., call capture) {4} |
| 211 | DF | .~.~> Call forwarding |
| 212 | DF | .~.~> Call transfer |
| 213 | DF | .~.~> Intercept (e.g., dead or changed number) |
| 214 | DF | .~.~> Secretarial or answering service |