Telephone line to Soundcard - NEED HELP

[[email protected]]

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:MEWA:IT&rd=1


If you can help send an email to [email protected] o m

 

[Watson A.Name - \Watt Sun, the Dark Remover\]

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=577413
6958&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&sspag
ename=STRK%3AMEWA%3AIT&rd=1

It's supposed to be used with a tape recorder which is isolated from the
AC line. It is not meant to be used with anything else connected to AC.

Buy a phone patch, which is made for this purpose.

 

[Wim Willemse]

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

A capacitor (e.g. 1 muF) in series with the center conductor of the
patchcord, and you have a cheap solution connection your telephone line to
your PC.

29 USD seems awfully expensive for a 1 muF capacitor.

Regards Wim

 

[Watson A.Name - \Watt Sun, the Dark Remover\]

A capacitor (e.g. 1 muF) in series with the center conductor of the
patchcord, and you have a cheap solution connection your telephone line to
your PC.

No, it is _not_ a solution. The telephone line must be isolated
completely from the equipment, both for shock hazard and for equipment
protection reasons. Connecting either side of the telephone line to
equipment will unbalance the line and cause multiple problems, RFI from
AM radio stations and a huge amount of HUM.

 

[Wim Willemse]

No, it is _not_ a solution. The telephone line must be isolated
completely from the equipment, both for shock hazard and for equipment
protection reasons. Connecting either side of the telephone line to
equipment will unbalance the line and cause multiple problems, RFI from
AM radio stations and a huge amount of HUM.

Well it works excellent for me; probably it is better to have a capacitor in
both the tip and in the ring wire.
I "tap" the telephone line with my PC wile the telphone is off-hook
ofcourse;
The Telephone set creates a proper termination for the line. The tap is a
high impedance tap which has not much impact on the line behaviour.

regards Wim

 

[Bill Janssen]

"Watson A.Name - "Watt Sun, the Dark Remover"" <[email protected]>
schreef in bericht

Well it works excellent for me; probably it is better to have a capacitor in
both the tip and in the ring wire.
I "tap" the telephone line with my PC wile the telphone is off-hook
ofcourse;
The Telephone set creates a proper termination for the line. The tap is a
high impedance tap which has not much impact on the line behaviour.

regards Wim

The beast way to get audio from the telephone line is to use a
transformer with two identical
primary windings. Use the windings in series with a capacitor connecting
the mid points.

The mid points can then be used to check voltage, short (with 400 Ohms)
to "hold" the line
etc.

Bill K7NOM