geoff@decwrl.dec.com> (04/07/91)
I'm looking for line (two or four wire) multiplexers, that would allow me to evenly device a 9600 bps line into to two 4800 bps lines, or a 2400 baud line into two 1200 baud lines. I recall the good ol' Bell 209A modem used to have this capability. I CANNOT use Stat-MUX's because its flow control (XON/XOFF/whatever) would make the line non-transparent to the protocol(s) going over over it. I need to lines to appear as if they each had a dedicated circuit of their own. Any suggestions for such equipment appreciated. Thanks, Geoff Goodfellow Anterior Technology 415-328-5615 geoff@fernwood.mpk.ca.us
mjohnsto@uunet.uu.net> (04/07/91)
In article <telecom11.271.10@eecs.nwu.edu> fernwood!geoff@decwrl.dec.c om (Geoff Goodfellow) writes: > I'm looking for line (two or four wire) multiplexers, that would allow > me to evenly device a 9600 bps line into to two 4800 bps lines, or a > 2400 baud line into two 1200 baud lines. I recall the good ol' Bell > 209A modem used to have this capability. > I CANNOT use Stat-MUX's because its flow control (XON/XOFF/whatever) > would make the line non-transparent to the protocol(s) going over over > it. I need to lines to appear as if they each had a dedicated circuit > of their own. You *can* use Stat-MUX's or at least Micoms. The Micombox 2's we used to use were configurable enough to where you could just disable XON/XOFF flow control along with about a zillion other parameters. We used about 20 of them to remote field locations. Each could be upgraded to 16 ports apiece and all ran up to 9600 baud. I ran into my problem when I attempted to use GNU Emacs remotely over the multiplexed lines. As you may know Emacs doesn't like XON/XOFF *at all*. Never mind that I was the only person out of 80 who used Emacs. I changed all the units over. (It's good to be the king). All of our tubes ran fine without it. These boxes where, if I recall correctly, four wire units and supported RTS/CTS flow control. Michael R. Johnston mjohnsto@shearson.com || mjohnstonn@mcimail.com System Administrator UUCP: uunet!slcpi!mjohnsto Lehman Brothers Inc. Phone: (212) 640-9116