379 / | HD | TELEPHONIC COMMUNICATIONS |
67.1 | DF | AUDIO MESSAGE STORAGE, RETRIEVAL, OR SYNTHESIS {13} |
88.22 | DF | .~ Message management {3} |
88.23 | DF | .~.~ Controlled by subscriber or caller {2} |
88.25 | .~.~.~ Message storage in centralized location (e.g., central office, PBX, etc.) {1} | |
88.26 | DF | .~.~.~.~> Recording voice message from non subscriber caller |