Re: modem initialization

Stefan Hudson (hudson@mbay.net)
Thu, 14 Sep 1995 18:31:53 -0700 (PDT)

> We are using PM2e's with Multitech rack mount managed modems here. After
> driving over for the second time to the office at 2am to reset the modems it
> occurred to me that there has to be some way to have the Portmaster send an
> ATZ (or any string) to the modem every so often.

We had the same problem (although just attaching the port and typing
AT would fix it... I think the modem got confused about the DTE baud
rate) until we started having the modems reset after each connection
and whenever DTR goes down. Here is the config string, which includes
some other useful stuff...

at$sb115200%e0s13=0&c4&d3&w0

$SB115200 - Serial port baud rate to 115200
%e0 - Disable escape code (+++)
s13=0 - Disable remote config request
&c4 - Reset on CD loss
&d3 - Reset on DTR loss
&w0 - Save it.

To configure the modems, I attached each port in turn and pasted the
string to the modem. A bit of a pain, but I havn't had to touch them
since.

-- 
     /// Stefan Hudson <hudson@mbay.net>  
__  /// Senior Network Administrator
\\\/// Monterey Bay Internet  -  Email: info@mbay.net
 \XX/ Voice: 408-642-6100  Fax: 408-642-6101 Modem: 408-642-6102