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av1d

How to make a videophone

9 posts in this topic

How to make a videophone

by avid

Here is an interesting way to transmit

pictures over a regular phone line.

For this experiment lowtec & I used

MMSSTV (http://www.qsl.net/mmhamsoft/mmsstv/),

a microphone and speakers attached to our PC.

However, any SSTV software will likely work.

How it works:

Have your friend load MMSSTV and set it to receive.

Have them hold thier microphone to the speaker

of the telephone handset.

It may be better to use an induction coil,

also known as a telephone pickup.

You should now load an image into MMSSTV.

Place your speakers at an appropriate volume,

so that the volume is loud but doesn't distort while

sounding into the phone mouthpiece.

note: It's best to use a corded phone,

as some cordless phones don't take well

to acoustic coupling.

Place the microphone of your telephone handset

close to your speaker, and press transmit.

Wait until the tones have stopped, and

your friend should have received your image.

Trouble shooting:

Make sure your microphone is directly on the earpiece,

that your microphone settings are not muted,

and that the microphone gain on your Windows sound

mixer is at an appropriate level.

If you're the party transmitting the image,

adjust your speaker volume. Try placing the microphone

of the handset on the speaker, or backing off from

the speaker.

+++

12:48 AM 3/29/2004

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Thats awesome!! Cool stuff. BTW, is mmsstv microsoft or free software (im guessing microsoft because of all the Ms, just wanted to make sure...)

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thanks a bunch ^_^

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You can use any SSTV program, the only reason MMSSTV was mentioned is because it's the only freeware SSTV program I could find, plus the features are better.

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hey avid, are you a radio amateur operator also? it would probably be best not to discuss callsigns but im just curious.

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hey avid, are you a radio amateur operator also? it would probably be best not to discuss callsigns but im just curious.

Unfortunately no. I should just go get the damn thing and get it over with.

Are you a ham?

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as a matter of fact I am! lol ham radio is a great (legal) hobby that can be enjoyed very much by phone phreaking/hacker types. and about getting your license all i have to say is GET IT SOON! the license requirments are going to be lowered and if you have a technician class license before they change the standards you get a free upgrade...hmm maybe ill post a pic of my radio while we're at it.

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