[GreenKeys] TTY to Ethernet Converter or TTYoIP

[Keelan Lightfoot]

The unix/linux 'mail' command is designed to be operated on a line oriented console.

- Keelan

On 2011-07-31, at 6:45 PM, Lee Spenadel wrote:

> Keelan,
> 
> This is quite impressive.  This prompted a thought in my mind.  Has anyone been able to interface a POP/IMAP email account to TTY?
> 
> Lee
> 
> From: Keelan Lightfoot <keelan at mail.grenander.com>
> Date: Sun, 31 Jul 2011 18:42:14 -0700
> To: Green Keys <greenkeys at mailman.qth.net>
> Subject: [GreenKeys] TTY to Ethernet Converter or TTYoIP
> 
> Lee's queries about connecting a teletype to a PC has prompted me to share a project I've been working on.
> 
> I'm working on a 'TTY to ethernet' converter, that will eliminate the need for a separate computer entirely. The hardware design is complete, and I have all the pieces needed to build a prototype, I just haven't had the time to put one together. The hardware will occupy a board about the size of a business card, and will include an ethernet port for connecting to a network, and a teletype loop connection (reconfigurable as either half duplex or full duplex).
> 
> My initial design was going to use a Lantronix XPort, which is a serial-to-ethernet converter housed in a slightly oversized through hole ethernet jack. The XPort wasn't capable of anything lower than 300 baud, 8 bit operation, so I was going to include a PIC microcontroller to handle the conversion to 45 baud, 5 bit operation. Then I discovered that the same people that make the Xport also make the XPort 'pro', which is the same hardware, but it runs a tiny Linux OS.
> 
> I've spent some time poking around the serial driver firmware source, and it supports 5 bit operation out of the box (contrary to the XPort documentation), and with a few changes to the firmware, I will be able to add 45.45, 50 and 75 baud operation.
> 
> The idea is to allow a teletype to connect to any internet service that supports telnet, including other teletypes. I've also been working on a 'TTYoIP' server that would allow a number of teletypes to be connected together on a virtual loop via the internet.
> 
> Anyway, I'll update as I make more progress on the hardware, but I'm curious if there'd be any interest in this. The fully populated board would probably cost somewhere in the range of $100, most of that cost is for the XPort module, which costs around $70 alone.
> 
> - Keelan
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