wadehvac:
I love this and would love to put one you have made in my shop to communicate to my house for vintage fun for kids to see, Also for communication. I you tube some stuff and I’m out on making one, over my head but would like to purchase one. I’m not sue happy and don’t mind buying a prototype or what not, just want to use two vents he phones to telecom back and forth using Original ringer(the fun part). Please contact me threw email tulsariversideac@gmail.com. I
I'm pleased you like it, but unfortunately this is not a project which I would like to hand over to someone who does not have enough experience to solve problems because I can test it only with the old telephones available here which may not match the ones you have available.
You'll see in this thread that someone else had problems with a particular phone type and I'm not sure what the outcome was.
You can put a request in the "Gigs and Collaborations" section of the forum and maybe someone can accept the job to build it and test it with the phones you intend to use and over the distance (cable length) you intend use. Include a link to this thread.
I would, however, be prepared to give some support to an experienced maker if they have problems or questions about this design. They would simply use the existing thread for that purpose.