Michael_Carman@mindlink.bc.ca (Michael Carman) (06/05/91)
Can anyone out there in Netland help with a problem I'm having with my modem? I have a MNP5 with v.42 and am wondering if I need a special cable to get these features working with my Mac SE? I'm currently using my old cable from my 1200 baud modem and, although the modem functions fine at plain-Jane 2400 baud, I cannot seem to get it to work as an error correcting MNP5 modem. I recall reading somewhere that I should be using a cable that supports more than the three pins provided by most cables but would like some confirmation of this and suggestions as to where I might buy a proper cable. Local Apple dealers have been no help whatsoever.
Rick_McCormack@mindlink.bc.ca (Rick McCormack) (06/05/91)
Michael Carman <Michael_Carman@mindlink.bc.ca> writes: MC > Can anyone out there in Netland help with a problem I'm MC > having with my modem? I have a MNP5 with v.42 and am MC > wondering if I need a special cable to get these features MC > working with my Mac SE? MC > MC > I'm currently using my old cable from my 1200 baud modem MC > and, although the modem functions fine at plain-Jane 2400 MC > baud, I cannot seem to get it to work as an error correcting MC > MNP5 modem. MC > MC > I recall reading somewhere that I should be using a cable MC > that supports more than the three pins provided by most MC > cables ... Reading from my EMAC 2400 MNP5/v42 manual, I find there a reference to a change in pin use depending on whether CTS is invoked (or not) with the "!C" command. To quote: "If the !C0 command is in effect, the CTS signal is output on pin 5, and the DCD signal is output to pin 8 (default). If the !C1 command is in effect, the CTS signal is not output, the DCD signal is output on pin 5, and pin 8 is meaningless." I traced my original problems in MNP5 connections to interactions between RedRyder 10.4 and my settings for the EMAC, revolving around my use of the !C command on a Mac Plus. ( I have since found other intermittent problems -- but they were all mine!) Hope this helps, as I understand that the above situation is common on many MNP5 modems using the Mac serial ports. -- _________________________________________________________ | IMAGISTICS Business Theatre Technology | Rick McCormack | | Interactive Effective Compelling | Vancouver, BC | |________________________________________|________________| | UseNet: Rick_McCormack@mindlink.uucp | A O-L: Rique | |_________________________________________________________| .
dant@ryptyde.UUCP (Daniel Tracy) (06/08/91)
Responding to the following: "Can anyone out there in Netland help with a problem I'm having with my modem? I have a MNP5 with v.42 and am wondering if I need a special cable to get these features working with my Mac SE? I'm currently using my old cable from my 1200 baud modem and, although the modem functions fine at plain-Jane 2400 baud, I cannot seem to get it to work as an error correcting MNP5 modem." I believe you need a cable that supports hardware handshaking. Just ask for a Macintosh modem cable for V.32 modems that supports Hardware Handshaking at your local dealer, I guess.
pda@wdl30.wdl.loral.com (Paul D Adolph) (06/18/91)
In article <33@ryptyde.UUCP> dant@ryptyde.UUCP (Daniel Tracy) writes: >Responding to the following: >>"Can anyone out there in Netland help with a problem I'm having with my modem? I >>have a MNP5 with v.42 and am wondering if I need a special cable to get these >>features working with my Mac SE? >> >>I'm currently using my old cable from my 1200 baud modem and, although the >>modem functions fine at plain-Jane 2400 baud, I cannot seem to get it to work >>as an error correcting MNP5 modem." >> >I believe you need a cable that supports hardware handshaking. Just ask for >a Macintosh modem cable for V.32 modems that supports Hardware Handshaking >at your local dealer, I guess. No just about it! I tried about 7 different sources, half of which said they had "just the right cable" which of course wasn't, and the other half either had no clue or were not interested in helping me. After wasting a lot of time on the phone and in various stores, I finally bought some connectors and cable and built my own. With just a little interpretation, all the info I needed I found in the manuals for my Classic and the modem. However, one problem I found is that since the DTR line is used for handshaking, you seem to lose it for other functions your terminal software might support, ie "drop DTR on hangup" etc. I am speaking about a Classic here -- I don't know if this is the case for the newer machines.