Is there any device you can put on a phone line to continuously or periodically draw a sealing current?
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I'm thinking a DSL filter plus an appropriate resistor across the "phone" side might do it, but is there a better approach?
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Replying to @RichFelker
Yes. Go buy an active sealing current terminator.
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Replying to @CarlosODonell
Thanks. Any pointers for where? Google isn't being very helpful.
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Replying to @RichFelker @CarlosODonell
The ones I see look like they're for dry lines with no voice (& thus no current source at other end).
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Replying to @RichFelker
They are indeed for dry lines. Why would you need sealing current if you have a wet line? Your phone should be drawing enough current to prevent contact oxidation?
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Replying to @CarlosODonell @RichFelker
... or to put it another way: Plug a cheap phone into your jack. That should be enough?
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Replying to @CarlosODonell @RichFelker
I just pulled up G.992.3 and there is a sealing current requirement in the standard for modems meeting the spec. However, the operator is given the option to disable wetting currents. Have you done a line test for this? Can you draw 20mA from the ATU-C?
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Yes, there's a voice line, just unused, so there's certainly current available to draw.
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