JTD wrote:
Most of the time it is RFI that screws the speed. The sources include
TVs, calculators, feature phones particularly cordless, ups, phone
and electrical cables running together. But the biggest problem is
TVs and feature phones. However I think that parallel lines before
the splitter will be the most common problem in the near future.
I have been getting 560~590 MB for the past week on night downloads
Telephones kept on-hook have only the ringer circuit connected across
the tel line. Phone ringers are designed for a very low frequency use
whereas the adsl line carries a high frequency signal. This adsl signal
gets absorbed by the phone ringers and even when on-hook, will attenuate
this signal. Thats why Gishu got low speeds on his line. Once the phones
are connected after the splitter, they will stop interfering as that
section is designed to carry that load. I have a fax machine with a fax
guard ( drawing 1.5 ma) , my computer's modem and a parallel phone in
the fax machine connected after the splitter. During installation, the
adsl guy told me not to have any phones across the adsl line.
Regards,
Rony.
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