bell-system
| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| From 1956—“Tools of Telephony”: Western Electric in the Bell System |
|
0 | 139 | 20 February 2023 |
| From 1950—Direct Dialing Long Distance Telephone Calls |
|
1 | 188 | 22 December 2022 |
| Debugging an Electromechanical Telephone Crossbar Switch with a Trouble Recorder |
|
1 | 204 | 10 December 2022 |