Re: [aclug-L] Problems configuring modem

[John Phillips <jphillip@xxxxxxxxxxxxx>]

The slow response in possibly an interupt conflict.



On Mon, 28 Dec 1998, Bates, Rod wrote:

> I am having problems getting my modem configured to talk
> ppp to Southwind.  
> 
> Minicom's built in default command strings will initialize
> it and get it to dial, get a carrier, and a login screen from
> southwind.  However, it's extreeeemly slow in sending back
> stuff, a dozen or so characters every 30-60 seconds.  
> 
> It never seems to return "OK", even tho' its documentation
> says it will, and it's initialized with the command to return
> results as words.  
> 
> If I use minicom's built in commands to initialize and dial,
> then those things happen at reasonable speed.  If I just
> type the modem commands in minicom's input buffer,
> I get the terribly slow thing.  
> 
> It responds to the initialization string by echoing a copy
> of it.  I can get it to initialize using pppd/chat by putting
> this in as the expected result.  
> 
> Other, related mysteries: 
> 
> Does "~" in minicom command strings mean delay for some
> time?  It's all over the default strings, but not mentioned
> in the man page.  Does chat also recognize this? 
> 
> Does chat treat "^M" as carriage return?  There seem to be
> some of these both coming and going, but I find no mention
> of it in the chat man page. 
> 
> Whem minicom initializes the modem automatically at
> startup, the string which is displayed is different from the
> one in the minicom initialization setup in that it ends
> with "...Q" rather than with "...Q0".  When I use minicom's
> initialize command explicitly, the zero get echoed.
> 
> My modem manual (SupraExress 288i pnp) doesn't list 
> ATZ as a command, but it's in minicom's reset string, seems
> to be accepted, and minicom man says these default strings
> should work on all modems.  There is other evidence that
> the modem manual has mistakes. 
> 
> The -V option to chat doesn't seem to work when the
> chat command is  put in the options file and issued
> by pppd, but it does when chat is run from the command
> line. 
> 
> If I give pppd the wrong serial port device, I get a message
> claiming my kernel does not have ppp support.  Otherwise,
> it goes ahead. 
> 
> Any help is greatly appreciated
> 
> Rodney Bates 
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