Phone to sound card interface

C

Chaos Master

Guest
Hello people

I'd like to connect a standard phone to the microphone input and speaker output
of my _PC sound card_ (no modem involved) to make using "Internet phone"
software more pleasant to use.

What type of circuit do I need for this purpose?

Thanks

--
Chaos MasterŽ - Posting from Brazil - MSN: Wizard_of_Yendor@hotmail.com
BRASNET: Wizard_of_Yendor at #POA, #Canoas, #XLinuxNews
"Eu logo sem dar... mas cada um faz o que quer."
-- Wagner Shimatai no u-br.comp.so.linux
Use REPLY-TO e-mail address please! Use o endereço de e-mail do campo REPLY-TO
NP: C:\Meus Documentos\Downloads\linkin park - numb.mp3
 
On Thu, 29 Apr 2004 23:59:54 -0300, Chaos Master <NOSPAM@brasnet.org>
wrote:

Hello people

I'd like to connect a standard phone to the microphone input and speaker output
of my _PC sound card_ (no modem involved) to make using "Internet phone"
software more pleasant to use.

What type of circuit do I need for this purpose?

Thanks
something from here?
Click to expand...
http://www.markertek.com/ProdList.asp?cat=INTERFACE&subcat=AUDINT&prodClass=TELEPHONE&search=0&off=


martin

Yesterday it worked.
Today it is not working.
Windows is like that.
 
martin griffith bleeding:

something from here?
http://www.markertek.com/ProdList.asp?cat=INTERFACE
&subcat=AUDINT&prodClass=TELEPHONE&search=0&off=
Click to expand...
I think this is what I am looking for. Thank you.

--
Chaos MasterŽ - Posting from Brazil - MSN: Wizard_of_Yendor@hotmail.com
BRASNET: Wizard_of_Yendor at #POA, #Canoas, #XLinuxNews
Powered by Mozilla + Gravity + XChat (on Windows)/ Mozilla + Sylpheed + BitchX
(Linux)
 
martin griffith bleeding:


something from here?
http://www.markertek.com/ProdList.asp?cat=INTERFACE
&subcat=AUDINT&prodClass=TELEPHONE&search=0&off=
Click to expand...

$109USD !!!!!

Someone must have a schematic available for this.

Any ideas ??

hamilton
 
On a sunny day (Sat, 01 May 2004 09:56:55 -0600) it happened hamilton
<hamilton@deminsional.com> wrote in <4093c8af$1_2@omega.dimensional.com>:

martin griffith bleeding:


something from here?
http://www.markertek.com/ProdList.asp?cat=INTERFACE
&subcat=AUDINT&prodClass=TELEPHONE&search=0&off=


$109USD !!!!!

Someone must have a schematic available for this.

Any ideas ??
Plenty as I am using VOIP via the PC, but I have a headset.
Click to expand...
Also a mike at thye keyboard..
Handsfree, you can do other things while listening.
Why want a normal phone? I think these suck.
JP
 
Jan Panteltje wrote:
Plenty as I am using VOIP via the PC, but I have a headset.
Also a mike at thye keyboard..
Handsfree, you can do other things while listening.
Why want a normal phone? I think these suck.
JP
Click to expand...
The OP and I are interested in using a REAL telephone handset.

I know its not Kool as a handsfree setup. But its what we want.

thanks for trying anyway.

hamilton
 
Jan Panteltje bleeding:

Plenty as I am using VOIP via the PC, but I have a headset.
Also a mike at thye keyboard..
Handsfree, you can do other things while listening.
Why want a normal phone? I think these suck.
Click to expand...
It is to make things more "user-friendly" to peoples that are not used with a PC
microphone.

I am using MSN Messenger to do voice chat.

[]s
--
Chaos MasterŽ - Posting from Brazil - MSN: Wizard_of_Yendor@hotmail.com
BRASNET: Wizard_of_Yendor at #POA, #Canoas, #XLinuxNews
Powered by Mozilla + Gravity + XChat (on Windows)/ Mozilla + Sylpheed + BitchX
(Linux)
 
On Sun, 02 May 2004 01:36:53 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Sat, 1 May 2004 22:01:56 -0300) it happened Chaos Master
myself@ig.com.br> wrote in <MPG.1afe3cc0d861d2599898e4@NEWS.INDIVIDUAL.NET>:

Jan Panteltje bleeding:

Plenty as I am using VOIP via the PC, but I have a headset.
Also a mike at thye keyboard..
Handsfree, you can do other things while listening.
Why want a normal phone? I think these suck.

It is to make things more "user-friendly" to peoples that are not used with a PC
microphone.

I am using MSN Messenger to do voice chat.
OK, many years ago I did some sort of thing like that.
You would need a small 48 V DC generator ciruit (published a 1 transsistor
circuit here several times that could be used for that), a series resistor
to limit the of-hook current, and then you need some circuit that prevents
the signal send to the phone appearing a lot in the signal from the phone.
(You have to substract the two).
This can be done with a special transformer, but also electronically with an
opamp circuit.
Leaving out the ring tone generator..
Hope I remembered that right.
JP
look up Lundahl transformers,
Click to expand...
http://www.lundahl.se/pdfs/datash/6702.pdf
they do a phone hybrid transformer, I used to use much cheaper OEP
transformers, and a 1K pot, and crockclips




martin

Yesterday it worked.
Today it is not working.
Windows is like that.
 
On a sunny day (Sat, 1 May 2004 22:01:56 -0300) it happened Chaos Master
<myself@ig.com.br> wrote in <MPG.1afe3cc0d861d2599898e4@NEWS.INDIVIDUAL.NET>:

Jan Panteltje bleeding:

Plenty as I am using VOIP via the PC, but I have a headset.
Also a mike at thye keyboard..
Handsfree, you can do other things while listening.
Why want a normal phone? I think these suck.

It is to make things more "user-friendly" to peoples that are not used with a PC
microphone.

I am using MSN Messenger to do voice chat.
OK, many years ago I did some sort of thing like that.
Click to expand...
You would need a small 48 V DC generator ciruit (published a 1 transsistor
circuit here several times that could be used for that), a series resistor
to limit the of-hook current, and then you need some circuit that prevents
the signal send to the phone appearing a lot in the signal from the phone.
(You have to substract the two).
This can be done with a special transformer, but also electronically with an
opamp circuit.
Leaving out the ring tone generator..
Hope I remembered that right.
JP
 
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