Acoustic Coupled Modems & papertape....

From: Frank McConnell <>
Date: Wed Mar 10 18:24:57 1999

Arfon Gryffydd <> wrote:
> Anyone know a where I can find an old RS-232 Acoustic coupled modem?

Keep looking, they turn up.

> How about the specifications for paper-tape (i.e. hole spacing, paper
> width, etc.)?

Hole spacing is 0.1". 8-level tape is 1" wide, with 3 holes, then a
smaller-diameter sprocket hole, then 5 holes. There also exist 7- and
5-level tapes which are simply narrower (3+1+4, 3+1+2), and maybe also
a six-level tape but I don't know what used it. Somewhere I have what
looks to be a parallel tape reader with a knob that rotates
different-width guides into place, but it has no manufacturer

-Frank McConnell
Received on Wed Mar 10 1999 - 18:24:57 GMT

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