hello
how to make phone home to usa with wire audio and video
They already make it for you - you need just to buy
hello
how to make it for selling
Why do you think that somebody will want to buy your phone, if you know nothing about how to make it?
Sorry for asking that - how old are you?
hello
how to make it for selling video call over wire
hello
how to talk to you with wire audio and video without arduino
Perhaps thats not a good question for a forum thats specifically for Arduino topics.
I'll be back later - I have to go offline for awhile. But for now...
This s a BIG PROJECT! I won't try to discourage you, but you'll probably get discouraged yourself.
First look-up how a regular analog land line phone works. It's usually called POTS (Plain Old Telephone Service). There is a ring voltage, there is a DC voltage to detect if the phone is on or off-hook and the audio is a low-voltage, low impedance analog signal. And there is tone dialing (DTMF = Dual Tone Multi-Frequency). I think rotary pulse dialing is still supported but you can buy DTMF chips.
You may also want to look-up how a POTS MODEM works. It converts digital data (the picture in your case) to tones that are sent as "sound" over a regular phone line, and it will work across town or long distance just like a voice so it doesn't need anything special from the phone company.
It's different from a modern DSL modem. A (faster) DSL MODEM goes to a MODEM at the phone company, which basically means you need an Internet subscription on both ends.
@texasr you really start sounding like a troll...
I believe that he's trying to do troll-free calling
I'm back...
So, figure-out all of the pieces/requirements and take it one step at a time.
You need a ringer/ring-detection circuit. (Probably the easiest thing, so start with that). The ringer voltage is about 90V and 20Hz (please research and double-check everything I say because this is from memory). Of course any of your "regular electronics" needs to be protected from this (relatively) high AC voltage. You don't have to generate the ring signal for the other end, that's taken care of by the phone company.
There is also a DC voltage of about 40V used for on-hook/off-hook detection. (When you are off-hook, current is drawn, the voltage drops, and the phone company detects the drop and sends the dial tone, etc.). In an old (non-electronic) phone, the DC also powers a carbon microphone and it's used for pulse dialing.
There are inductors on the line and they'll give a high-voltage "kick" when disconnected.
Of course, your electronics needs to be protected against those voltages too.
The analog audio is pretty straightforward. A microphone with an amplifier (or preamp) and a speaker with an amplifier. You'll have to research the voltage and impedance requirements. And because transmission and receiving share the same wires, you'll need an analog cancelation or subtraction circuit (simple). Otherwise, your voice will be too loud in your ear and the other voice will be too quiet. And/or if you are making a "speakerphone" you need cancelation to prevent feedback-squeal.
You can buy DTMF dialing chips or you can use the Arduino but the Arduino will need a driver circuit and voltage protection, etc. (The special chips may need additional circuitry too.)
Then, you need a digital camera and video display (and associated circuitry). Get it working locally first before attempting to transmit/receive over the phone line. It can be relatively low resolution because your bandwidth is VERY limited anyway. It should use seria data connections because the MODEM is serial and that saves any extra conversion.
You'll need a MODEM circuit o send/receive digital images. You should be able to find specialized chips for this too. I believe the maximum data-rate over a phone line is 56kbps. (SLOW!) That means you can't get smooth-continuous video, and the higher the resolution, the longer you'll have to wait between image updates (or "frames"). Compressing the images/video should help (and is probably "required") and that will require special chips or probably something more powerful than a "regular Arduino".
You can't send analog video over a phone line... It's simply "too slow" (not enough bandwidth). You can send a high-resolution digital image over a phone line if you have "all day".
If you've ever listened to a phone line with a MODEM or FAX machine on the line, you know that you can hear the "data". You'll need to sense talking (on either side) and switch-off the video data while talking, and mute the audio when video data is being transmitting. Plus, you'll also have to multiplex (switch) between sending & receiving video because you are sharing one pair of wires and they both can't transmit & receive at the same time. TRICKY STUFF! (POTS is designed so both sides can talk and listen at the same time, but that's just the analog voice.)
And if you get this far... You'll need two phone lines at home (or wherever you are working) so you can call yourself and test-troubleshoot-debug both ends.
Actually, there were modems that allowed voice on a sub-channel while data was being used on the primary audio channel. I worked with a company in the 1980's that had customer support being done that way. Usually with data files that took hours to send or receive.
Is this going to be the new "how is babby formed?"