telephone to sound card plug

Z

Zaphod

Guest
Does anyone have a circuit for an interface suitable to connect an
Australian telephone socket to a pc soundcard?

I want to try the VRS software on http://www.nch.com.au/vrs/index.html
but don't want to spend the US $84 on their recommended device that
according to their forum also zaps out line in sockets on some sound
cards.

I have been lent an adapter from a friend's micro recorder and all it
is is a couple of diodes, caps and resistors. Can't see any line
isolation, so worst come to worst I could just copy that one and risk
zapping an input.

Cheers
 
Try

http://www.trillium.com.au/products-recadapt.php

Telecom approved.

JG
"Zaphod" <nothere@yahoo.co.uk> wrote in message
news:f0mju1hfbbkd3rl2arj8daepdmqj7latfe@4ax.com...
Does anyone have a circuit for an interface suitable to connect an
Australian telephone socket to a pc soundcard?

I want to try the VRS software on http://www.nch.com.au/vrs/index.html
but don't want to spend the US $84 on their recommended device that
according to their forum also zaps out line in sockets on some sound
cards.

I have been lent an adapter from a friend's micro recorder and all it
is is a couple of diodes, caps and resistors. Can't see any line
isolation, so worst come to worst I could just copy that one and risk
zapping an input.

Cheers
Click to expand...
 
Is there something special about your sound card that you need to use it?
If not, why not simply use an internal modem with wave interface?
My PCI modem card (Lucent winModem) provides a wave interface which allows
it to be used to record and send audio using appropriate software. (EG I
have a virtual answering machine).

Unless cost / benefit says otherwise, a software, not hardware solution is
usually the better, more versatile choice.

Dave Merrett


"Zaphod" <nothere@yahoo.co.uk> wrote in message
news:f0mju1hfbbkd3rl2arj8daepdmqj7latfe@4ax.com...
Does anyone have a circuit for an interface suitable to connect an
Australian telephone socket to a pc soundcard?

I want to try the VRS software on http://www.nch.com.au/vrs/index.html
but don't want to spend the US $84 on their recommended device that
according to their forum also zaps out line in sockets on some sound
cards.

I have been lent an adapter from a friend's micro recorder and all it
is is a couple of diodes, caps and resistors. Can't see any line
isolation, so worst come to worst I could just copy that one and risk
zapping an input.

Cheers
Click to expand...
 
"Simone Merrett" <smallthorns@ozemail.com.au> wrote in
news:43ed2166$0$3648$5a62ac22@per-qv1-newsreader-01.iinet.net.au:
Is there something special about your sound card that you need to use
it? If not, why not simply use an internal modem with wave interface?
My PCI modem card (Lucent winModem) provides a wave interface which
allows it to be used to record and send audio using appropriate
software. (EG I have a virtual answering machine).
Unless cost / benefit says otherwise, a software, not hardware
solution is usually the better, more versatile choice.
Click to expand...
The other nice side effect of this approach will be that it's
legal. The modem will almost certainly have the required Austel
approvals for connecting to the PSTN, so the isolation is
already done for you.

GB
 
Many thanks to those that replied here and in the other groups.

I've taken your coments on board particularly the safety issues, and
I'll use some parts from an old modem to make sure.

For those that have followed this thread with a view to making their
own as well, here are the links to my preferred circuits that I found
after following helpful suggestions.

I'm building this for the Australian telephone system. So if anyone
has any comments or further suggestions, I'll be happy to hear them.

Thanks again to all.

http://www.solorb.com/elect/phone/tap/

http://www.hardwaresecrets.com/article/70

http://www.engadget.com/2005/09/27/how-to-build-a-telephone-recording-circuit-from-an-old-modem/







On Wed, 08 Feb 2006 22:16:27 +1030, Zaphod <nothere@yahoo.co.uk>
wrote:

Does anyone have a circuit for an interface suitable to connect an
Australian telephone socket to a pc soundcard?

I want to try the VRS software on http://www.nch.com.au/vrs/index.html
but don't want to spend the US $84 on their recommended device that
according to their forum also zaps out line in sockets on some sound
cards.

I have been lent an adapter from a friend's micro recorder and all it
is is a couple of diodes, caps and resistors. Can't see any line
isolation, so worst come to worst I could just copy that one and risk
zapping an input.

Cheers
Click to expand...
 
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