Arduino Dial Up Modem shield

|500x325

Dial Up modem's days are long gone but Land line still exists either in the form of home pbx or PSTN, An Arduino based Dial Up modem shield can be used for a lot of fun projects. I'm no electronics expert but modem chips are already available with AT Command support http://www.conexant.com/Product/modems/embmodems/CX93040/Pages/default.aspx

Reference Modem Design https://www.scribd.com/doc/293690360/Conexant-Embedded-Modem-reference-design

I think Arduino can produce this shield in no time what do you think? :~

It can be used as 1-Cold Caller Blocker 2-Telephone recording with Caller ID 3-Fax receiving/saving 4-Answering machine 5-Interactive voice response system 6-Home automation over landline 7-Foundation for Arduino based PABX 8-DATA Communication 9-Auto dialer (Connected over blutooth to smart phone's phone directory) 10- GSM to Landline gateway 11- Smart Telephone set 12- Call forwarding

Potentially a good idea. Maybe better with the CX93011 serial version of the chip though.

Yes Serial based chips are also available It can open a whole new world to Arduino Telephony with more compatible shields like 4 port extension we can build a small Arduino based home Telephone Exchange system with all sort of programing we want If Arduino guys don't do it then someone should put this project to KickStarter

Arduino Answering Machine/Caller ID - Cold caller blocker, take my money already. :smiley:

Exactly, possibility are unlimited lets hope someone to bring this Idea to life I emailed this to few shield designers lets see if they take some interest into it ;)

what about this Board? http://www.e-lins.com/EN/index.html

elinstech007: what about this Board? http://www.e-lins.com/EN/index.html

That board seems GSM based, Arduino already has GSM shield ,The concept shield in question is for land-line phone

burraak:

Dial Up modem's days are long gone but Land line still exists either in the form of home pbx or PSTN, An Arduino based Dial Up modem shield can be used for a lot of fun projects. I'm no electronics expert but modem chips are already available with AT Command support http://www.conexant.com/Product/modems/embmodems/CX93040/Pages/default.aspx

I think Arduino can produce this shield in no time what do you think? :~

May I ask where you can buy?

That's a concept picture and not available as far as I know.

Maybe if enough people want this (and why not?) Adafruit could easily produce something like this.

This would be a good project . Has anybody been able to do basic text /data control / file transfers via a 56kmodem and an arduino ?.

I have a place that has land line but no mobile cell coverage (out on a farm ) so it would be nice to be able to talk to a modem and transfer data or send messages for control or for modem to automatically via an arduino .. send this data to another device via land line so it can transfer this data to an online html page etc or online file ...

I'm surprised this has still not become a viable project. As it's an ideal system to swap data over very long distances. Probably due to issues/cost of getting a shield certified for connection to phone line. Radicom seem to do some ideal looking modules http://www.radi.com/modular51.htm http://www.radi.com/modular29.htm but probably not for hobby use.

Radicom specializes in designing and manufacturing modems for embedded system designers, original equipment manufacturers (OEM) and volume corporate users.

I just wish I had kept my old USR modems now.

Unless it could sold as “not approved for connection with the public telephone network line” getout clause.

Vellerman sell a Telephone Amp
http://www.vellemanusa.com/products/view/?country=us&lang=enu&id=350560
kit, which I doubt has been approved for connection either. :slight_smile:

These look great any idea how much they cost ? I guess it is possible to use these as they have approval to connect.

My needs would be to have an Arduino data logger collect time stamped information then , connect it to a modem shield which at time interval X rings up another arduino unit or pc with modem and sends some data it has collected .It is ideal for places that have a phone but no internet .

I was also investigating the use of warning module arduino that can call another phone without it being rung up and using the ring tone and length of call to issue basic information to another module that listens for ringing and length of ringing .

I've no use for one, but it looks a very good idea. With it, you'd be able to have a remote Arduino automatically 'phone home' to upload collected data. But couldn't a USB shield, with a USB mobile [cell] phone dongle do the same job?

das250: I was also investigating the use of warning module arduino that can call another phone without it being rung up and using the ring tone and length of call to issue basic information to another module that listens for ringing and length of ringing .

I though I had replied to this a while back but it never seemed to make it to the board. You could maybe use DTMF as it allows 16 different tones so with a combination of *, #, A, B, C, D & 0-9 you could maybe send some quite complex messages.

@henry

No because the application is in the county and they only have a phone line . Also it may be handy for people who may want to log data and send very infrequently , an alarm event etc .. or some non often event .. and a phone line is available but not paid internet..

@RIVA, yes it might be a good method for sure .. This method is still used in some industries ..

I meant that the receiving arduinos do not pick phone up off hook and simply transmit the info via the ringing of the phone .. only the sending arduino dials but the call should be free because it is not picked up at other end .. This means you could use the phone system without using the phone system .. An interesting concept .. I wonder if the same concept can be used on internet systems .

If you could find a way to send custom Caller ID (this sent before the phone rings, I think) then the arduino could decode this, at most the phone would only need to ring once.

Nice idea.. Its amazing once you set up some basic challenges how people quickly start to create great ideas ... It's like water dripping through cracks ..

Thanks for the idea s.. keep them coming and we might get some interest to build a few test ardunos ..

8) Unfortunately noone cared to pick this project otherwise we could have seen many interesting telephony related projects based on this idea e.g arduino based 4 port pbx its like arduino telephone exchange but none is interested I tried to contact few shield venders they gave me estimated price of 1000 to 1200 USD which I cannot afford Anyway whoever want to peruse please note along with modem chips CONEXANT also provide a complete circuit diagram for reference modem CSM92 ,all you need to do is to combine CONEXANT modem with Arduino