| Section
| Date
| Issue
| Size
| Title
|
| C85.001 | 1962-05-01 | 3 | 49.26 KB | Checking List - C85 Group - Common Systems |
| C85.010.00 | 1959-08-01 | 1 | 7.27 MB | Gfeller Subscriber Line Concentrator 49-9-2 - General Description |
| C85.010.01 | 1959-08-01 | 1 | 8.96 MB | Gfeller Subscriber Line Concentrator 49-9-2 - Detailed Circuit Operation |
| C85.010.02 | 1959-08-01 | 1 | 18.00 MB | Gfeller Subscriber Line Concentrator 49-2-2 - Schematics |
| C85.010.04 | 1959-09-01 | 1 | 3.80 MB | Gfeller Subscriber Line Concentrator 49-9-2 - Initial Preparation and Line-Up |
| C85.010.05 | 1960-03-01 | 1 | 2.36 MB | Gfeller Subscriber Line Concentrator - Power Supply |
| C85.010.06 | 1959-09-01 | 1 | 1.52 MB | Gfeller Subscriber Line Concentrator 49-9-2 - Apparatus Requirements and Adjusting Procedures |
| C85.010.07 | 1959-09-01 | 1 | 567.38 KB | Gfeller Subscriber Line Concentrator 49-9-2 - Piece-Part Data, Replacement Procedures and Component Data |
| C85.020.01 | 1961-11-01 | 2 | 1.07 MB | Line Concentrator No. 1A - Preinstallation Tests and Tests and Inspections At Time Of Installation |
| C85.020.02 | 1961-09-01 | 2 | 632.33 KB | Line Concentrator No. 1A - Cutover Procedures and Addition and Deletion of Individual Lines |
| C85.020.03 | 1962-04-01 | 2 | 2.22 MB | Line Concentrator No. 1A - Systems Tests |
| C85.020.04 | 1962-02-01 | 2 | 434.27 KB | Line Concentrator No. 1A - Trouble Analysis |