On Wed, Dec 4, 2019 at 12:26 AM Glen Slick via cctalk <[email protected]> wrote: > When I worked in a group that was doing modem related software over 20 > years ago two of the telephone line simulators we used were from > Teltone and from TAS. > > You can find Teltone TLS-2, 3, 4, and 5 boxes on eBay. The TLS-2 and > TLS-3 are two line boxes, the TLS-4 and TLS-5 are four line boxes.
I have a TLS-4 box. It's handy. We got it because we were developing our own TelCo simulator, 2 line, but you could dial different numbers to simulate different connection failure conditions (busy, fast busy, half-connect...) We did end up shipping our own box but it wasn't a big seller. It was fantastic to have around, though, when I was writing autodialer software for our product and I needed to simulate different external events on demand to test error reporting and recovery. I can definitely recommend the TLS products for a small setup. -ethan P.S. - I know where my TLS-4 is and this thread reminds me I need to find the manual for it. I could bring it and some other gear to a Vintage Computer Fest for a display that's centered around serial comms and dialup.
