No Dial Tone

Hi folks,
recently purchased a Sitecom external serial connection modem. Installed it etc and it installed no problem. Went to connect and nothing. Tried every check box combo and nothing. Reinstalled harddrive and still nothing. It lights up fine and query modem works ok, but cant connect. Took out the phone lead and plugged into a phone and the line works fine. I noticed that when the line is plugged into the modem and if I go to pick up another phone in the house, I get no dial tone on any of the phones. But when I unplug the cable from the modem, i get the dial tone back. I have insstalled it on win 95.

I also tried it out on win 2000 and getting exactly the same problem.
The lights flicker on it when querying and it seems ok. I tried to use phone dialler but couldnt dial out either. It seems the modem opens the port straight away. i also disabled wait for dial tone and nothing.

Please help!

Regards,
Kwaoc
ps Urgent!
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kwaocAsked:
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FaircoConnect With a Mentor Commented:
This is a very common problem, I also encountered it. The problem is that your phone cable has 4 wires, but only 2 of them is actually used. The other two are grounded. Most likely your modem connects the grounded wires with the live ones, therefore causes a short circuit in your phone line. That's why you can't hear dialtone from the other handsets as well, when the line is plugged in the modem.
Use a cable that has only two pins wired in the plug, or cut the unused grounded wires elsehow. The two center pins are the live ones, and the two outer ones need to be cut. The following linked picture shows the perfect cable:
https://owl.tamucc.edu/~mcs/dorms/rj11.jpg
Notice, that the two outer pins are missing, only the center two pins are in place.
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kwaocAuthor Commented:
Hi Fairco,
Just logged in now to check this message. Believe it ornot, I figured out what you just told me about an hour ago. You are absolutely correct as to what theproblem is. I realised this after actually taking a second to just check the cables! Of course I will award you the points as if I had of checked this last night I would have got the problem solved straight away.
Thanks for the help,
Kwaoc
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