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Parallel/Bidirectional Cable

By figrsk8r ·
I just started working at a school that had a bunch of computer equip. donated. Is there an easy way to tell the difference between a standard and a bidirectional parallel cable?

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Parallel/Bidirectional Cable

by dmiles In reply to Parallel/Bidirectional Ca ...

Parallel is a 25-pin connector with the centronics connector to the printer
Bi-Directional is a usb connector

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Parallel/Bidirectional Cable

by figrsk8r In reply to Parallel/Bidirectional Ca ...

The question was auto-closed by TechRepublic

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Parallel/Bidirectional Cable

by TheChas In reply to Parallel/Bidirectional Ca ...

Ther are 3 classes of parallel printer cables.

The old "standard" printer cable has the minimum number of wires for basic one way communication.

A bi-directional printer cable has all 25 lines wired.

The new "IEEE-1284" standard is bi-directional and constructed to support the high speed communications required by the newer printers.

Most IEEE-1284 cables are marked as such on the jacket. These are going to be your best cables.

Look at the DB-25 end of the other cables. If any pins are missing, these will not work as bi-directional cables.

If the cable is thin as compared to the other cables, it may not have all 25 wires.

The only way to be sure, is with a cable tester that verifies that all the connections are wired.

You can take an IEEE-1284 cable, and ohm it out with an ohm meter to get a wireing diagram.
You can then check any suspect cables to that.

There are numerous on-line references that have the pinouts af various cables posted.

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Parallel/Bidirectional Cable

by figrsk8r In reply to Parallel/Bidirectional Ca ...

The question was auto-closed by TechRepublic

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Parallel/Bidirectional Cable

by eBob In reply to Parallel/Bidirectional Ca ...

Depending on how big a pile a "bunch of equipment" is, and how many cheap resources (e.g., students) are available.

I would just "try them". In general, the Printer Control Panel in Windoze (I assume) has an option to test communications. This will report on:
a - if bi-directional parallel is required
b - if it's available (and if it's not, it's likely that the issue is the cable, although it could be the parallel port controller itself...)

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Parallel/Bidirectional Cable

by figrsk8r In reply to Parallel/Bidirectional Ca ...

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Parallel/Bidirectional Cable

by figrsk8r In reply to Parallel/Bidirectional Ca ...

This question was auto closed due to inactivity

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