File: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/TimeThumbnailDimensionsUserComment
current02:24, 10 November 2007Thumbnail for version as of 02:24, 10 November 2007621 × 789 (169 KB)YeateshCrossbar switches, 200-point. View of a Line Link frame in a Crossbar 5 office.
13:28, 9 November 2007Thumbnail for version as of 13:28, 9 November 2007621 × 789 (169 KB)YeateshCrossbar switches, 200 point. View of a Link Link frame at crossbar No. 5 office.
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