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'[OT] Connecting audio source to phone handset'
2000\03\05@145143 by Remo Seebach

picon face
<x-flowed>Hello everyone,
Does anyone know an appropriate circuit to connect an audio source (e.g. a
soundblaster card) to the telephone handset connection?  I want to do this
rather than connect directly to the phone line, as I don't want to have to
use a FCC registered DAA (data access arrangement).  I want to be able to do
send/receive audio over the handset connection (North American phone
system).

I suppose that this type of info would be of interest to some PICsters too.

Thanks for your help!

Remo

p.s.  Links to appropriate web sites containing such info would be most
appreciated too.  I've checked all the 'standard' telephone technie web
sites with no luck.
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</x-flowed>

2000\03\06@103929 by Wagner Lipnharski

picon face
For a total non-electrical contact, you could search for the old
Phone-Data-Coupler. It is a "inverted" phone hook with ruber boots that
attach to the telephone hook, so you have a "sound" connection only.

If what you want is just to "play" sounds at the phone line, you could
produce a small speaker inside a rubber boot that could be attached
directly to the telephone mouthpiece.

An electrical solution is using a small 600 x 600 Ohms Phone Line
Transformer between the soundblaster output and the phone line.  You
could use a switch to connect the transformer to the line, or even a
relay controlled by the PC RS232 or Parallel port.

Remo Seebach wrote:
>
> Hello everyone,
> Does anyone know an appropriate circuit to connect an audio source (e.g. a
> soundblaster card) to the telephone handset connection?  I want to do this
> rather than connect directly to the phone line, as I don't want to have to
> use a FCC registered DAA (data access arrangement).  I want to be able to do
> send/receive audio over the handset connection (North American phone
> system).

2000\03\06@122426 by Harold M Hallikainen

picon face
On Sun, 5 Mar 2000 14:40:19 EST Remo Seebach <spam_OUTremo_manTakeThisOuTspamHOTMAIL.COM>
writes:
> Hello everyone,
> Does anyone know an appropriate circuit to connect an audio source
> (e.g. a
> soundblaster card) to the telephone handset connection?  I want to
> do this
> rather than connect directly to the phone line, as I don't want to
> have to
> use a FCC registered DAA (data access arrangement).  I want to be
> able to do
> send/receive audio over the handset connection (North American phone
> system).
>

       I have a feeling that the device would still have to be certified under
part 68.

Harold


FCC Rules Online at http://hallikainen.com/FccRules
Lighting control for theatre and television at http://www.dovesystems.com

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2000\03\06@123451 by David VanHorn

flavicon
face
<x-flowed>At 08:19 AM 3/6/00 -0800, Harold M Hallikainen wrote:
>On Sun, 5 Mar 2000 14:40:19 EST Remo Seebach <.....remo_manKILLspamspam@spam@HOTMAIL.COM>
>writes:
> > Hello everyone,
> > Does anyone know an appropriate circuit to connect an audio source
> > (e.g. a soundblaster card) to the telephone handset connection?  I want to
> > do this rather than connect directly to the phone line, as I don't want to
> > have to use a FCC registered DAA (data access arrangement).  I want to be
> > able to do send/receive audio over the handset connection (North
> American phone
> > system).


Is this a product, or a hobby project?

If it's a product, then bite the bullet. It's not hard to work up an
interface that meets part 68.
If you like, I'll consult with you and design you one. You don't have any
options here, if it's a product you're going to sell, then you MUST get
part 68 and part 15.

If it's a hobby project, then all you have to do is protect the PC from the
phone line voltages, and not put any voltages out on the phone lines.
I would advise against directly connecting to a telephone, since there's no
isolation at all.

Either way, you need a simple DAA, but if it's a product, then it needs to
be certifiable.

</x-flowed>

2000\03\06@144245 by Rich Leggitt

picon face
AFAIK, there's no handset connector standard. But you may find this
interesting:

http://www.hello-direct.com/scripts/item.asp?cat=Digital+Adapters&itemno=5850&pos=1

(or search for 'linestein')

-- Rich

On Sun, 5 Mar 2000, Remo Seebach wrote:

{Quote hidden}

2000\03\06@172953 by BBRAIN

flavicon
face
Hi!
If you want look for "Phreak" and you will find it.
I dont know exactly what is the box name, but exist.

----Eredeti Ÿzenet----
Felad—: Rich Leggitt <rleggittspamspam_OUTCONCENTRIC.NET>
C’mzett: @spam@PICLISTKILLspamspamMITVMA.MIT.EDU <KILLspamPICLISTKILLspamspamMITVMA.MIT.EDU>
D‡tum: 2000. m‡rcius 6. 20:43
T‡rgy: Re: [OT] Connecting audio source to phone handset


>AFAIK, there's no handset connector standard. But you may find this
>interesting:
>
>www.hello-direct.com/scripts/item.asp?cat=Digital+Adapters&itemno=58
50&pos=1
{Quote hidden}

this
>> rather than connect directly to the phone line, as I don't want to have
to
>> use a FCC registered DAA (data access arrangement).  I want to be able to
do
>> send/receive audio over the handset connection (North American phone
>> system).
>>
>> I suppose that this type of info would be of interest to some PICsters
too.
{Quote hidden}

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