rickt@wybbs.mi.org (Rick Tucker ) (05/01/91)
I have recently started using v.32 modems and have noticed that when you terminate the connection(via loging out of the host) that you get a steady stream of 'the unknown'. Any way to prevent this. It really freaks out the terminal, and attached printer. I am using a MultiModem V32 (mt932ea) The other(host) sites are using mt932ea and a US Robitics V.32(whatever) -- ======================================================================== Rick Tucker | ^^ T W I N P E A K S ^^ rickt%indcon@wybbs.mi.org | "The owls are not what they seem." uunet!4gen!indcon!rickt | quote from the giant.
ho@hoss.unl.edu (Tiny Bubbles...) (05/01/91)
rickt@wybbs.mi.org (Rick Tucker ) writes: >I have recently started using v.32 modems and have noticed that >when you terminate the connection(via loging out of the host) >that you get a steady stream of 'the unknown'. >I am using a MultiModem V32 (mt932ea) >The other(host) sites are using mt932ea and a US Robitics V.32(whatever) That's very strange. The V.32 spec is *supposed* to kill connections cleanly, without any garbage. You will, however, get a LOT of garbage after using a V.32 modem on non-reliable connections. Does this happen when you're going MT<->MT, or only when one of the modems is a USR? >======================================================================== >Rick Tucker | ^^ T W I N P E A K S ^^ alas... | "Dead, wrapped in plastic." | quote from ABC -- ... Michael Ho, University of Nebraska Internet: ho@hoss.unl.edu | Harry was too homely for Sally. (I have proof.) Disclaimer: Views expressed within are purely personal and should not be applied to any university agency.
gandrews@netcom.COM (Greg Andrews) (05/02/91)
In article <422@wybbs.mi.org> rickt@wybbs.UUCP (Rick Tucker ) writes: >I have recently started using v.32 modems and have noticed that >when you terminate the connection(via loging out of the host) >that you get a steady stream of 'the unknown'. >Any way to prevent this? > If your modem has error correction (a la MNP or V.42) and the other modem(s) can support it, then try turning it on. If not, then your best bet is to beat the host to the punch and make YOUR modem disconnect before the garbage characters begin to show up. >Rick Tucker | ^^ T W I N P E A K S ^^ -- .------------------------------------------------------------------------. | Greg Andrews | UUCP: {apple,amdahl,claris}!netcom!gandrews | | | Internet: gandrews@netcom.COM | `------------------------------------------------------------------------'
fg041@unocss.unomaha.edu (fg041) (05/06/91)
>>I have recently started using v.32 modems and have noticed that >>when you terminate the connection(via loging out of the host) >>that you get a steady stream of 'the unknown'. >That's very strange. The V.32 spec is *supposed* to kill connections >cleanly, without any garbage. You will, however, get a LOT of garbage >after using a V.32 modem on non-reliable connections. >Does this happen when you're going MT<->MT, or only when one of the >modems is a USR? I have noticed this frequently when calling Intel 9600ex modems from the USR Courier HST. I'm not sure which modem is at fault (both ??) but I will often get half a screenful of garbage before the session dies. I have never heard of the v.32 standard including a 'sanitary' session shutdown. I would think that SOME noise would be unavoidable if the line is simply broken. On the other hand I can visualize some kind of termination handshake which prevents it. Anyway, you got me very curious about it. Good day! JSW
tnixon@hayes.uucp (05/10/91)
In article <3267@unocss.unomaha.edu>, fg041@unocss.unomaha.edu (fg041) writes: > I have never heard of the v.32 standard including a 'sanitary' session > shutdown. I would think that SOME noise would be unavoidable if the line > is simply broken. On the other hand I can visualize some kind of > termination handshake which prevents it. Anyway, you got me very curious > about it. Well, it's not called "sanitary session shutdown" in V.32. It's known as "GSTN Cleardown". What the modem does is initiate a retrain request, but turn off all of the "rate bits" that indicate the speeds at which it is willing to operate. This condition (unwilling to operate at any speed) is defined as requesting the call to be cleared. Most modems WILL properly hang up if they RECEIVE such as cleardown sequence, but not all modems generate it in response to a request for disconnection from their local DTE (with DTR drop or ATH command). -- Toby Nixon, Principal Engineer | Voice +1-404-840-9200 Telex 151243420 Hayes Microcomputer Products Inc. | Fax +1-404-447-0178 CIS 70271,404 P.O. Box 105203 | UUCP uunet!hayes!tnixon AT&T !tnixon Atlanta, Georgia 30348 USA | Internet hayes!tnixon@uunet.uu.net