flexfax: Re: SUMMARY: What's "REMOTE HANGUP: DTE to DCE data underflow (code 43)"?

["Kai O'Yang" <oyang@phoebe.fcit.monash.edu.au>]

Hi again,

My original question:
>I'm trying to install a Hylafax server on a Solaris 2.5.1 x86 box with
>Hayes Accura 288 faxmodem. 
 
>Sometimes sendfax works but a lot of times it dies with:
>...
>Sep 23 13:16:17.05: [15317]: <-- data [924]
>Sep 23 13:16:17.05: [15317]: SENT 25500 bytes of data
>Sep 23 13:16:17.05: [15317]: <-- data [2]
>Sep 23 13:16:18.37: [15317]: SEND end page
>Sep 23 13:16:18.62: [15317]: --> [8:+FHNG:43]
>Sep 23 13:16:18.62: [15317]: REMOTE HANGUP: DTE to DCE data underflow (code 43)
>Sep 23 13:16:19.24: [15317]: --> [2:OK]
>Sep 23 13:16:19.24: [15317]: <-- [5:ATH0\r]
>Sep 23 13:16:19.37: [15317]: --> [2:OK]
>Sep 23 13:16:19.38: [15317]: SESSION END
> 
>Does anyone know what is the problem and how to fix it?

The problem was traced back to a faulty DB25<->DB9 adaptor which does not
have RTS/CTS lines wired! (stupid me. shouldn't have used those kind of
el cheapo cables.) After replacing the cable, setting up using 19200bps with
rtscts flow control, everything is fine.

Special thanks to David Woolley for helping me out.

Kai