mikula@umn-cs.cs.umn.edu (Tim L. Mikula) (05/10/91)
I have XENIX 2.3.3 and would like to install a MultiTech 9600 baud modem with V.42bis data compression. According to SCO, XENIX can only talk to a modem at speeds up to 9600. But, to get a speedup from the data compression in my modem, I will have to communicate with my modem at 19.2 or 38.4 Has anyone solved this problem? Also my modem connections use error correcting modems. I have used kermit, but the error correction built into the transmission reduces the effect of the data compression. Is there a better program available where error correction can be turned off when used with today's smarter modems? Without solutions to these problems, 9600 baud and error correcting modems will not benefit XENIX users very much. Thanks, Tim Mikula (mikula@cs.umn.edu)
6600joef@ucsbuxa.ucsb.edu (Joe Foster) (05/13/91)
In article <1991May10.003348.5812@cs.umn.edu> mikula@umn-cs.cs.umn.edu (Tim L. Mikula) writes: >I have XENIX 2.3.3 and would like to install a MultiTech >9600 baud modem with V.42bis data compression. According >to SCO, XENIX can only talk to a modem at speeds up to >9600. But, to get a speedup from the data compression in >my modem, I will have to communicate with my modem at >19.2 or 38.4 Has anyone solved this problem? >Also my modem connections use error correcting modems. >I have used kermit, but the error correction built into >the transmission reduces the effect of the data >compression. Is there a better program available >where error correction can be turned off when used >with today's smarter modems? >Without solutions to these problems, 9600 baud and >error correcting modems will not benefit XENIX users >very much. >Thanks, Tim Mikula (mikula@cs.umn.edu) I don't know about programs that can take advantage of youy modem's error correcting abilities (I just use cu and uucp), but I have used baud rates of "19200" and "38400" within my /usr/lib/uucp/Devices file. These settings map to the EXTA and EXTB stty arguments. So far, I only have the standard PC serial ports COM1 and COM2 (/dev/tty1A and /dev/tty2A). The modem (a ViVa 9642e) does report carrier at 9600 and connection (between the modem and my computer) at 38400 baud. But then again, I haven't installed the SLS that, among other things, munges uucp machine names. If you are using error-control modems, using uuencode, uudecode, and cu's put and take commands work pretty well. At least, it ends up being faster than Kermit!!! I would prefer ZMODEM, though. Joe Foster 6600joef@ucsbuxa.ucsb.edu