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English: Rear view of a Teletype Model 33 ASR showing the answer-back drum, the brown spined cylinder at the left center of the image. By breaking off spines of this drum. the message sent in response to the ASCII ENQ character could be encoded. The drum operates like a music box mechanism, with the comb of metal fingers in front of the drum reading out the message as the drum rotates.
Source Own work
Author Douglas W. Jones


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25 November 2013

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current14:21, 26 November 2013Thumbnail for version as of 14:21, 26 November 2013712 × 805 (213 KB)Douglas W. JonesUser created page with UploadWizard
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