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Topic | Replies | Views | Activity | |
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Green Goo vs. a Telephone Central Office Crossbar Switch | 2 | 206 | 15 January 2023 | |
Debugging an Electromechanical Telephone Crossbar Switch with a Trouble Recorder | 1 | 266 | 10 December 2022 | |
Telephone Switching Living History in Seattle | 0 | 310 | 21 October 2022 |