Re: Modem disconnects

John G. Thompson (jgt10@livingston.com)
Thu, 12 Sep 1996 13:52:50 -0700 (PDT)

On Thu, 12 Sep 1996, Dave Stewart wrote:
>
> I've looked in the archives, and so far, can't find any solutions to the
> modem disconnect problem.
>
> Our situation: PM2ER/30's, with BocaModem v.34s. Every so often, the modem
> connection just drops... with no explanation. Running COMOS 3.3.1 on 5 of
> the PM2ERs, and 3.3.2c1 on 3 of them... and the problem happens, apparently
> at random, on all of the them. No particular port, no particular modem.
>
> Did I miss the solution somewhere?

Nope. There are several steps to take in solving this problem.

1. Double check you modem init string in your modem table entry.
Make sure that it is set for hardware flow control, locked dte rate,
and hangup on dtr drop.

2. Try to make sure your users reporting the problem have their modems
properly configured.

3. Try and check the telelphone lines for noise or bad quality.

--


I'm working on some other possible things to try.  


One thing to try is setting the modem's carrier drop delay to a longer
value.  Most modems default to a CD drop delay of .5 to 1.0 seconds.
You might try setting this value to something like 2.0 seconds.


For most AT command modems this is set in S10.


Hope that helps!!  Let us know what happens!!


JGT

--
John G. Thompson      Livingston Enterprises Inc.    Phone: (800) 458-9966
JOAT(MON)             6920-220 Koll Centre Pkwy.       Fax: (510) 426-8951
support@livingston.com Pleasanton, CA 94566      http://www.livingston.com