I got an interesting box of Sierra Semiconductor
2400 boards, etc. today
at the TRW swap meet. From what I can find using Google, Sierra only
made chipsets. But this set of stuff includes unstuffed boards with
"Sierra Semiconductor Corporation", "2400 Internal Modem", TTI
Copyright
It sounds like you may have found some modem evaluation kits. Did you
get any documentation with them (like PCB layouts or schematics)? If not,
stuffing these things. I'll just add this
stuff to my collection of
modems, but I thought this stuff was rather interesting!
You mean you're not going to assemble one of the boards just for fun :-(
I have far too many projects going, so unfortunately, it just isn't fun
anymore. That is one of the reasons I am starting to sell/give/toss off
some of the extra stuff. But I think an evaluation board is something of
historical interest and worthwhile preserving. I'll most probably try
and get the schematics & parts list to see if I have any complete
unbuild boards & major parts. At that point, I'll keep one and make the
others available to anyone who would like one of these things. It may
take a year or so though!