peterse@jacobs.cs.orst.edu (Erik Petersen) (02/13/91)
I found a Hayes Micromodem 100 in a surplus store, with documentation. Unfortunately, the one part that is not described iss the part I did not get; the MICROCOUPLER. The Microcoupler was a Bell Labs proprietary device that coupled the modem to the phone line. If you have technical info about the Microcoupler, or info about something similar (or even a spare Microcoupler) I would love to hear from you. Thank you.
jmaynard@thesis1.hsch.utexas.edu (Jay Maynard) (02/14/91)
The Microcoupler was not a Bell device at all, but rather built by Hayes and sold with the Micromodem 100 and the Micromodem II (for the Apple II). It was built in a little smoked Plexiglas box, and had a 10-pin ribbon cable connector on one end and a modular jack on the other. This all happened right after it became legal to connect customer-provided equipment to the phone lines; the earlier DCHayes 80-103 S-100 modem (their very first product) had a 5-pin connector on the top edge of the card, which was supposed to be connected to a phone company-provided box (but you could connect the right two wires to the phone line if you didn't mind violating tariffs). I'll look at the docs for my Micromodem 100 and see if it includes a schematic of the Microcoupler, though I doubt it will. The user was supposed to not tamper with the Microcoupler at all, since under part 68 the manufacturer was the only party authorized to make repairs. -- Jay Maynard, EMT-P, K5ZC, PP-ASEL | Never ascribe to malice that which can jmaynard@thesis1.hsch.utexas.edu | adequately be explained by stupidity. "Today is different from yesterday." -- State Department spokesman Margaret Tutwiler, 17 Jan 91, explaining why they won't negotiate with Saddam Hussein