Question about D-Link DU 560M (DU-560M) Modem
Usually a long tone signifies that no response was received for the call. Since you have tested the modems and they are functioning at a hardware level then the problem is in the connection - most likely in the other town the quality of the phone line is very low, or the phone company simply didn't modernized the network. They might be still on analog systems (or even worse, on mechanical) in that town so the tone dialling and faster speeds simply aren't supported. The only thing you can try is to set a lower modem speed - you should go even as low as 14.4k .
Posted on Aug 01, 2010
Are you resetting the modems between installs?.
Perhaps it is simply retaining the "OLD" settings, and NOT updating then to the new.
Are you sure that BOTH PSTN services are both the same, NO call waiting etc, on one and not on another, check for any dissimilarities between the two.
The way you have tested them could be better it is best that that are tested under real life conditions? Set ONE at a time get ONE going, then try the other ON the actual PSTN line, and an external location, is best.
Some PSTN numbers are "Stepping" if so there WILL be problems, two completely different numbers are OK, but if stepping or sequential, then often these have issues. This may be an exchange issue if so.
You don't describe what ya trying to do, but if just simple modem to Modem communication, or access to the Internet, I presume Dial-up?
Also have the exchange check the suitability of the PSTN lines at the bad location, as perhaps the internet, cannot connect due to poor lines, what voice may work over some modems simply will not.
Make sure all BT jacks ate wired correctly, specifically, the Tip & Ring, ensure the are polarity correct, use the good location as a guide.
Posted on Aug 01, 2010
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Posted on Jan 02, 2017
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