Image:Crossbar-hy1.jpg

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[edit] Summary

100-point, 6-wire crossbar switch. Manufactured by Western Electric April, 1970, near the end of the Type B production run. Similar switches were used in Incoming Register Links and other subsystems not part of the regular voice fabric. Note the Vertical Off Normal contacts above each hold magnet. The Horizontal Off Normal contacts were housed under transparent covers, to the left of the left butterfly magnets and to the right of the right butterflies.

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