3 ms·
Heh, I’ve been doing a lot of reading on ISDN lately, working on a user mode ISDN stack myself. Much more than I should tbh. I wonder if the ones pictured in th
by the_only_law 6y ago
Heh, I’ve been doing a lot of reading on ISDN lately, working on a user mode ISDN stack myself. Much more than I should tbh. I wonder if the ones pictured in the article use BRI or PRI interfaces, I’d have to guess PRI personally.
I actually have a phone like that on my eBay watchlist, except it’s a video phone (using H.320 I imagine) I’ve been meaning to pick it up, I’ve have a couple unexpected expenses recently.
- icedchai 6y agoPRI was similar to a T1. I kinda doubt they had that at the payphone level.
- the_only_law 6y agoPerhaps you’re right. I was thinking that if this was part of a network of pay phones that they would want to be able to handle more than just the 2 calls per line an BRI would allow with less infrastructure (though I think lower rate calls are possible through additional multiplexing)
- hlandau 6y agoI'd guess it used BRI. PRI would probably have been considered too expensive to justify running to a payphone. My guess is the BRI socket on that payphone is only operable when you're not making a call, so the 2x64k BRI line can be assigned to the phone or passed through to that socket. You're working on a user-mode ISDN stack - this sounds extremely interesting! Care to drop me a line? https://www.devever.net/~hl/contact https://www.devever.net/~hl/contact