Image:Crossbar-200pt-hy3.jpg
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Bell System Type B crossbar switches, 200 point, of a kind made in the 1960s and early 1970s. View of a Link Link frame at crossbar No. 5 office. A Circuit Advance cord, or remote control for the Master Test Frame, hangs at the right.
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 02:24, 10 November 2007 | 621×789 (169 KB) | Yeatesh (Talk | contribs) | (Crossbar switches, 200-point. View of a Line Link frame in a Crossbar 5 office.) |
| 13:28, 9 November 2007 | 621×789 (169 KB) | Yeatesh (Talk | contribs) | (Crossbar switches, 200 point. View of a Link Link frame at crossbar No. 5 office.) |
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