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how to check modems.

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how to check modems whether they are working or not without phone lines and pc.

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how to check modems whether they are working or not without phone lines and pc.

Without a computer it is very difficult to determine if a modem is working, and just about impossible to tell if an internal modem is working. If you have an external modem, and IF you could find a repair manual for the modem, you could check the various voltages and that would give some idea. Unfortunately I have only seen ONE repair manual for a modem in the past 30 years (and that was 29 years ago).

If, however, you have two computers with modems, they can be checked without a phone line by connecting the modems together. We used to do this in the days before networks existed.

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