Modem to TCP/IP Converter ?

[GM]

I have some older (dial up) equipment that uses a 2400 baud modem.  Is there some way (Arduino?) to come up with a solution that would convert the modem signals to TCP/IP so that this unit could talk to the host over TCP/IP rather than through the modem.  The host provides both options . . . Thanks   Gary

[stea...@gmail.com]

Yes, connect another modem directly, and then you can use a serial-over-IP software or hardware adapter.  

Thanks,

Dan

Sent from my iPhone

On Feb 26, 2013, at 8:21, GM <garym...@gmail.com> wrote:

I have some older (dial up) equipment that uses a 2400 baud modem.  Is there some way (Arduino?) to come up with a solution that would convert the modem signals to TCP/IP so that this unit could talk to the host over TCP/IP rather than through the modem.  The host provides both options . . . Thanks   Gary

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[stea...@gmail.com]

What is the equipment? It may have a direct serial mode.

Thanks,

Dan

Sent from my iPhone

On Feb 26, 2013, at 8:21, GM <garym...@gmail.com> wrote:

I have some older (dial up) equipment that uses a 2400 baud modem.  Is there some way (Arduino?) to come up with a solution that would convert the modem signals to TCP/IP so that this unit could talk to the host over TCP/IP rather than through the modem.  The host provides both options . . . Thanks   Gary

[D.s.]

You can't use a 2400 baud modem for tcp. Well you can, but not in practice. Your peer has to be connected to a slow version of the Internet if you want to use anything slower the. 9600 baud.

On Feb 26, 2013, at 8:21 AM, GM <garym...@gmail.com> wrote:

I have some older (dial up) equipment that uses a 2400 baud modem.  Is there some way (Arduino?) to come up with a solution that would convert the modem signals to TCP/IP so that this unit could talk to the host over TCP/IP rather than through the modem.  The host provides both options . . . Thanks   Gary

[stea...@gmail.com]

I think he means to tunnel the 2400 baud serial data stream through the Internet, not send tcp/ip packets through a 2400 baud link.  

Thanks,

Dan

Sent from my iPhone

[#]

  not knowin anything bout your modem  its hard to say what it could do ,      got any specs on the hardware you have ?   
  if its like a old serial         http://www.overstock.com/Electronics/US-Robotics-USR5686E-External-Serial-Modem-Refurbished/3319173/product.html    id think you could tap the serial output an send it over tcp ip . 

         serial-over-IP   like steamfire said .  

http://playground.arduino.cc/Interfacing/SerialNet

[Sean McPherson]

If you just want to tunnel serial *over* IP I do this all the time w/ Lantronux devices, most often their simplest UDS1100. It has a single 25-pin serial port (and it comes w/ a 25<>9 adapter), plus an ethernet port. You can connect 2 Lantronix's together over the internet, or you can use virtual serial port software provided by them for free for a PC. For example, I have generator monitoring systems throughout the US, and I can connect to them from my latop by using our VPN (w/ constantly shifting encryption dongles and such to get there, but that's unrelated to the serial part) and then telling the client software on my laptop to use a serial port that just happens to be a virtual port. It tunnels over IP to the lantronix and then into the device, which has no idea I'm not sitting there w/ a 6' cable. Works great. I've also used this to connect 2 serial-based devices together using 2 lantronix's, most often when I need an air gap, and tunnel the serial over IP provided by a couple of encrypted bridged WiFi units (ie, if I have a parking lot I'm not allowed to tunnel under or throw wire over). You can get them for a hundred bucks and can power them from DC, w/ a wall wart they provide, or using PoE (which is very useful).

 

http://www.lantronix.com/device-networking/external-device-servers/uds1100.html

 

Sean

On Tue, Feb 26, 2013 at 10:58 AM, stea...@gmail.com <stea...@gmail.com> wrote:

[GM]

Thanks to all for the replies.  I have been under the weather for a few weeks and been unable to reply.

The situation is that the equipment that I have is intended to use a POTS 2400 baud modem to communicate data to a host machine.  The host offers a n internet based TCP/IP connection for the same service.  I would like to come up with a way to build some type of interface that would go between my machines POTS output, and convert the data stream to the TCP/IP so as to eliminate the use of the phone line.  Additionally, I might want to look at using CDMI as an alternative.  It is not really a "Tunnel" because the analog modem signals would have to be converted to TCP/IP packets at some point.   

Thanks

Gary