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Universal paper tape rader/puncher
- this page is a stub
N-4000 is a paper tape puncher, with an optional tape reader,
manufactured in the late 1980s by Facit in Sundyberg (Sweden), shortly before
the company was liquidated. The device was intended for the last generation
of teleprinters (telex)
as well as for the legacy CNC and CAD/CAM market.
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The N4000 was available in two versions: as a standalone tape puncher,
and as a combined puncher/reader.
In the latter case, an industry-standard optical paper
tape reader was mounted at the front. Both reader and puncher can handle 5,
6, 7 or 8 level 1 tapes at a speed of 30, 62 or 75 characters per second.
It can read tapes at a speed of 200 or 500 characters per second [A].
The device can be connected to the standard RS-232 port of a personal
computer (PC). This port is also known as a CCITT V.24 interface or the COM-port. The device has an internal 9kB buffer.
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The image above shows a typical Facit N4000 unit, with the optional reader
fitted at the front.
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In telegraphy, each character is represented by a column of holes, punched
in a tape. The holes are known as channels, tracks, levels or bits.
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© Crypto Museum. Created: Wednesday 20 May 2015. Last changed: Sunday, 20 May 2018 - 17:46 CET.
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