Xref: utzoo comp.dcom.modems:3699 comp.unix.questions:12856 comp.sys.ibm.pc:27403 Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!rutgers!rochester!pt.cs.cmu.edu!cadre!pitt!amanue!oglvee!jr From: jr@oglvee.UUCP (Jim Rosenberg) Newsgroups: comp.dcom.modems,comp.unix.questions,comp.sys.ibm.pc Subject: Re: MNP Auto-Reliable + getty: happy accident or design? Message-ID: <477@oglvee.UUCP> Date: 13 Apr 89 19:31:07 GMT References: <475@oglvee.UUCP> <11482@s.ms.uky.edu> Reply-To: jr@.UUCP (Jim Rosenberg) Organization: Oglevee Computer Systems, Connellsville, Pa Lines: 33 In article <11482@s.ms.uky.edu> david@ms.uky.edu (David Herron -- One of the vertebrae) writes: >When a pair of modems are negotiating MNP modes they're doing this >*AFTER* they've printed 'CONNECT' to their serial ports ^^^^^^^ You sure about this?? When I dial out auto-reliable to an MNP modem configured for auto-reliable there is a noticeable delay after the speaker shuts off and then I see the message: CONNECT RELIABLE I.e. it sure looks like the handshake happens *before* the CONNECT message is printed. >and they >do this by sending BREAKS at each other in particular ways. ^^^^^^^^^^^^^^ I'd like to know the details. If MNP is working without start & stop bits it would make sense for the dialing modem to send out its Link Request that way and see if it gets a valid response. It would make sense that this has to happen before it can print out the CONNECT RELIABLE message. If the answering modem is *not* in MNP auto-reliable mode it would indeed print CONNECT immediately -- but of course if you've got a getty connected to it you should have the modem in quiet mode, so it wouldn't print anything. (Unless you want all remote users to log in under the uid CONNECT! :-)) Help, We're just blundering around in the dark here: Is there an MNP wizard in the house? Who can really tell us in detail how the MNP handshake works?? Chuck Forsberg, you there?? -- Jim Rosenberg pitt Oglevee Computer Systems >--!amanue!oglvee!jr 151 Oglevee Lane cgh Connellsville, PA 15425 #include