[Coco] Plain Old Telephone (POT) Public Branch Exchange (PBX)

[dave at davebiz.com]

John Mark, 

I received your message to me via private email and replied but perhaps your Gmail account is relegating my return emails to your spam folder. I haven’t received a response from you yet. 

I have some good news in that I have located the PBX you were looking for. It will connect 16 extensions to 6 external lines. Contact me here or try again via my email. 


-Dave Philipsen

> On Jan 9, 2024, at 7:56 PM, John Mark Mobley via Coco <coco at maltedmedia.com> wrote:
> 
> All,
> 
> I have a table/booth at the 2024 CoCoFEST! See: https://www.tandylist.com/
> 
> It is Table 38 and it is labeled Plain Old Telephone (POT) Public Branch
> Exchange (PBX).
> 
> I hope to get a simple system of some kind working. Perhaps we can build
> something simple and expand on it in future years.
> 
> I may be able to build a Phone Line Simulator
> https://mumris.eu/SP2.htm
> 
> Internet Search: telephone line simulator DIY
> Internet Search: Telephone simulator schematic
> Internet Search: Telephone line simulator DIY schematic
> 
> I also hope to borrow a small PBX with something like 8 RJ11 extensions and
> 2 outside lines.
> 
> We can run wires on the floor and hold them down with adhesive tape. Or you
> can select a table close to me and just run the wire between or under the
> tables. Be sure to bring a long enough wire. Or you can bring something over
> to my table and hook it up for a time.
> 
> Write me and tell me if you need...
> A dial tone, ring voltage, Touch-Tone, or pulse dialing.
> An outside line.
> 
> Write me and tell me if you can bring a Bulletin Board System (or OS9
> system, or Linux system) to a telephone modem, Wi-Fi, RS-232, telnet, or
> ssh. Tell me if you can bring a FAX machine. Tell me if you can bring a
> magicJack or some such thing. Tell me if you can bring a Pocket Tone Dialer
> or Pocket Tone Dialer simulator. Tell me if you can bring a telephone. You
> can bring a candlestick phone even if I can not get pulse dialing to work.
> Tell me if you can bring a terminal, paper terminal, or set up your Tandy
> Color Computer to be a terminal. Tell me if you can bring a POT PBX. Tell me
> if you can bring a 300-baud modem or a 300/1200-baud modem.
> 
> Perhaps we can crowdfund the acquisition of a POT PBX for Glenside.
> 
> Do not be surprised if a magicJack can not reliably continue a 300-baud
> connection for more than 3 minutes.
> 
> Perhaps I can do a
> TI-Silent-700-direct-connect-modem-to-telephone-line-simulator-to-300-baud
> modem-to-RS-232-to-ESP32-to-Wi-Fi-telnet-to-Linux BASH-to-Python3-program.
> 
> Also, I would like to see 2 or more devices working over ethernet.
> 
> John Mark Mobley
> 
> 
> 
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