root@seachg.UUCP (root) (06/30/89)
I have a Hayes compatible 1200 bps modem from Anchor Automation (model 1200E). My understanding is that the modem is supposed to respond with CONNECT when it establishes a connection with the called system. This in fact is what happens about 1/2 the time. The rest of the time, the modem responds with a string of about 40 U's, even though it has established the connection. In both cases, the same destination modem is being called. This problem causes my uucico to fail half the time, so any suggestions as to the cause would be appreciated. Thanks, John Alsop
lamy@ai.utoronto.ca (Jean-Francois Lamy) (07/01/89)
This happens when my 9 month old kid uses my modem as a tam-tam... More seriously, check your cable, especially the ground wire. My Hayes kept doing weird things, including believing the phone was ringing and going in auto-answer until I replaced its cable. Jean-Francois Lamy lamy@ai.utoronto.ca, uunet!ai.utoronto.ca!lamy AI Group, Department of Computer Science, University of Toronto, Canada M5S 1A4
grr@cbmvax.UUCP (George Robbins) (07/01/89)
In article <159@seachg.UUCP> root@seachg.UUCP (root) writes: > I have a Hayes compatible 1200 bps modem from Anchor Automation (model 1200E). > > My understanding is that the modem is supposed to respond with CONNECT when it > establishes a connection with the called system. The U's are symptomatic of 1200 baud modems losing sync. If it happens that often, I'd borrow another modem to make sure it isn't a horrible phone line and then put that econo-modem where it belongs and get something better. -- George Robbins - now working for, uucp: {uunet|pyramid|rutgers}!cbmvax!grr but no way officially representing arpa: cbmvax!grr@uunet.uu.net Commodore, Engineering Department fone: 215-431-9255 (only by moonlite)
henry@utzoo.uucp (Henry Spencer) (07/02/89)
In article <159@seachg.UUCP> root@seachg.UUCP (root) writes: >...responds with a string of about 40 U's, even though it has established the >connection... What is happening is that the modem on the other end is being kicked into one of the self-test modes by noise or some other complication. The UUUU pattern ("the marching umber hulks") is what you get in that mode at 1200. (At 2400 it's wwww.) All modems meant for answer use in normal environments really should have remote initiation of self-test disabled. It's more a bug than a feature. I don't know of anything that can be done from the originate end to avoid this nuisance. -- $10 million equals 18 PM | Henry Spencer at U of Toronto Zoology (Pentagon-Minutes). -Tom Neff | uunet!attcan!utzoo!henry henry@zoo.toronto.edu