Phoneline to Soundcard - Need help

Anyone know how-to make a cable that would plug into my telephone jack
and then into my computer soundcard?

I bought one from EBay and when I plug the cable into my phone line and
then into the soundcard my line
goes dead.

One guy mentioned he uses an isolator circuit of some sort to not short
out the line in his device.

This is the one I bought below that doesn't work.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=14960&item=5774136958&rd=1&ssPageName=WDVW

**********

This one below supposedly works with a soundcard and phoneline.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5769614109&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1


If you can help send an email to SuprTrdr@Lycos.c o m

 

Radioshack sells something for this. It's made to hookup to a tape
recorder so it should work for a computer as well.
http://www.radioshack.com/category.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F008%5F008%5F012%5F001&Page=1