[ale] modem inactivity timeout

[eric at compgen.com (Eric Z. Ayers)]

Linux Idiot writes:
 > I posted a question earlier as to whether anyone knew why the
 > idle-disconnect option disappeared in pppd version found on RedHat 5.0. 
 > I didn't get any response, but started searching for a possible modem
 > option that performs this function.  On my 56K V.90 USR Sportster, the
 > docs say that register s19 can be set to a modem idle time out value.  I
 > tried testing this option by setting it to 2 minutes (ats19=2).  Well,
 > no timeout.  Anyone know why this did not work?  I'm not a tcp protocol
 > guru, so I was wondering if there is some info being passed that would
 > keep the timeout from becoming activated.


We use s19 set to 30 minutes and it does work for us on PPP links.  

-eric.