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File:Originating Register, Number Five Crossbar Switching System (Museum of Communications, Seattle).jpg

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English: Originating Register (OR) in a No. 5 Crossbar office. Photographed at the Museum of Communications in Seattle, Washington. June, 2000. Reed relay reader is reading the 2/5 code B digit storage pack. AJ type relays designated AS through LS are for steering each digit into the appropriate reed pack as it arrives. TP relay detects the second party of a w:party line
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current22:20, 10 November 2007Thumbnail for version as of 22:20, 10 November 20071,078 × 1,578 (533 KB)YeateshOriginating Register (OR) in a No. 5 Crossbar office. Photographed at the Museum of Communications in Seattle, Washington. June, 2000.

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