| Section | Date | Issue | Size | Title |
| 481-000-000 | 1982-04-01 | 1 | 158.67 KB | Numerical - Division 481 - Teleconferencing Services |
| 481-100-100 | 1982-04-01 | 1 | 1.40 MB | 100A Conference System Used with 4A Speakerphone System - Identification, Installation, Operation, and Maintenance |
| 481-100-101 | 1982-04-01 | 1 | 3.58 MB | 100A Conference System Used with a 50A1 Conference Set - Identification, Installation, Operation, and Maintenance |