Problem with Multi Tech MT 56000 ZDX modem

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Gert Doering writes:
> Just as a side note: using only ATZ for resetting the modem isn't a very
> good idea, as the modem might reset to settings that are unfit for mgetty.
> The most important thing is to make sure that auto-answer is off, so you
> might want to change the modem init chat to be:
> 
>   init-chat "" ATZ OK ATS0=0E1Q0 OK
> 
> (if it returns NO CARRIER immediately after ATA, it's usually a sign of
> "auto-answer and mgetty colliding" - see the "common problems" chapter in
> the mgetty documentation!)

I have had similar problems with my MT2834ZDXv connecting to my ISP if it's
using LAPM.  I've now told the modem to use NMP3/NMP5 instead, and it seems
to be better.  This problem sounds similar to your problem, only mine was
originating a call, yours is answering a call.  I'd also bet that in your
case the originating modem is a USR/3com?

For my modem, the command is AT#Ln, where n is:
 0 - modem negotiates V.42 mode
 1 - NMP on, LAPM off
 2 - LAPM off, NMP on
 3 - no detection, go straight to LAPM.

Check your modem manual, I know that there are command set differences between
the MT2834ZDXv and the MT2834ZDX.
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