On Sun, 27 Aug 2017 04:15:53 -0400, Paul
wrote:

wrote:
On Sun, 27 Aug 2017 00:15:39 +0700, JJ wrote:

On Sat, 26 Aug 2017 01:39:06 -0400, wrote:
I have a dual core XP machine and my dial up connection stopped
working. I have tried 3 different Win Modems. The modems install OK
and the diagnostics say it is connecting OK but when I try dialing
out, I get the message that there is no dial tone. That phone wire
works in a phone (same wire that plugs into the modem) I can also plug
a phone into the other port on the modem and dial out through it. I
tried swapping ports to be sure it wasn't just labeled wrong.
There is no activity on the line when I listen from another phone.
Any ideas?
If I'm not mistaken, land line telephone system has more than one standard.
Similar like TV signal standards e.g. NTSC-only or PAL-only on old TVs,
except that most TV nowadays support both standards. Or 110V vs 220V power
source standard in countries. Phones/faxes/modems only support one standard,
AFAIK. If this is the case, perhaps your modems aren't built for the phone
system used in your country.

This is all USA stuff made for POTS phone lines.

I don't recollect any Hayes AT command set items that
control the electrical standard. I would expect when you
buy a product, it's designed for the country you are in.
(A US purchase for US POTS standards.)

I'm trying to remember now, how I debugged my dialup modem.
I recollect I was able to snag all the AT commands that
were sent to it.

Looking through some old messages, I was using "portmon".

https://docs.microsoft.com/en-us/sys...nloads/portmon

But since you're not getting dial tone, I don't think
the dialing string makes any difference to that.

Paul

I have not played with it any more but my next plan is to run a
different wire to another phone outlet.
I have used the XP connection wizard and the AOL dial up tool. Usually
AOL seemed to be the most inclusive because they designed the
interface for just about any modem you threw at it back when dial up
was the way you connected. My problem right now is this machine is in
a piece of furniture so things are hard to get to. I am going to
assume there is a problem on the phone line side that does not show up
with a butt set. I have a 50' silver cord I am going to try next. I
can get to the Dmark with from here with that.