| Section
| Date
| Issue
| Size
| Title
|
| 550-000-000 | 1972-11-01 | 2 | 166.38 KB | Numerical Index - Division 550 - 755A PBX |
| 550-000-000 | 1980-11-01 | 3 | 65.69 KB | Numerical Index - Division 550 - 755A PBX |
| 550-000-000 | 1984-06-01 | 4 | 57.10 KB | Numerical Index - Division 550 - 755A PBX |
| 550-001-011 | 1972-12-01 | 1 | 311.51 KB | Equipment Test List - 755A PBX |
| 550-550-110 | 1937-10-28 | 1 | 10.09 MB | General Description - 755A PBX |
| 550-550-210 | 1960-08-01 | 4 | 8.67 MB | Installation - 755A PBX |
| 550-550-210PA | 1963-11-01 | A | 208.95 KB | Installation of No. 755A P.B.X. - Lamp Circuits |
| 550-550-230 | 1955-06-01 | 2 | 1.23 MB | Tests and Inspections at Time of Installation - 755A PBX |
| 550-550-500 | 1952-05-01 | 2 | 477.71 KB | Alarms - Operation Tests - 755A PBX |
| 550-550-590 | 1952-01-15 | 2 | 694.19 KB | Link and Link Allotter Circuits - Operation Tests - 755A PBX |
| 550-550-665 | 1938-07-12 | 1 | 662.12 KB | Trunks - Operation Tests - 755A PBX |