| 379 / | HD | TELEPHONIC COMMUNICATIONS |
| 67.1 | DF | AUDIO MESSAGE STORAGE, RETRIEVAL, OR SYNTHESIS {13} |
| 88.01 | ![]() | .~ Voice activation or recognition {3} |
| 88.02 | DF | .~.~> Voice verification (e.g., voice authorization, voiceprint, etc.) |
| 88.03 | DF | .~.~> Voice dialing |
| 88.04 | DF | .~.~> Voice controlled message management |