| Section
| Date
| Issue
| Size
| Title
|
| 548-000-000 | 1984-06-01 | 4 | 37.84 KB | Numerical Index - Division 548 - 750A PBX |
| 548-500-110 | 1929-12-03 | 1 | 3.82 MB | General Description - 750A PBX |
| 548-500-200 | 1933-01-25 | 2 | 178.71 KB | Preparation for Installing - 750A PBX |
| 548-500-210 | 1960-08-01 | 3 | 1010.23 KB | Installation - 750A PBX |
| 548-500-230 | 1960-08-01 | 3 | 448.16 KB | Tests and Inspections at Time of Installation - 750A PBX |
| 548-500-310 | 1930-05-19 | 2 | 76.01 KB | Alarms - Method of Tracing - 750A PBX |
| 548-500-320 | 1932-08-10 | 3 | 70.27 KB | Method of Taking Equipment and Circuits Out of Service - 750A PBX |
| 548-500-500 | 1952-05-01 | 4 | 143.08 KB | Alarms - Operation Tests - 750A PBX |
| 548-500-590 | 1930-05-19 | 2 | 161.36 KB | Link Circuits - Operation Tests - 750A PBX |
| 548-500-665 | 1956-01-01 | 3 | 231.16 KB | Trunks - Operation Tests - 750A PBX |