On Sun, 17 Apr 2022 23:26:35 -0300
"Ragnarok"  wrote:

> I try to use sexpots with my usrobotics 56k external.
> the modem work fine with minicom, so no physical connection issues
> but i get a response timeout error.
> If I set the -null parameter, sexopot starts but i think that i
> should sent the init string to modem.
> 
> 
> root@scarlet:/sbbs/exec# ./sexpots -com /dev/ttyS0
> 
> Synchronet External POTS Support v2.0-Linux Copyright 2022 Rob
> Swindell
> 
> 4/17 23:22:20  Synchronet Communications I/O Library for Linux v1.19
> 4/17 23:22:20  Build Mar 12 2022 17:24:24 GCC 6.3.0
> 4/17 23:22:20  TCP Host: localhost
> 4/17 23:22:20  TCP Port: 23
> 4/17 23:22:20  Opening Communications Device (COM Port): /dev/ttyS0
> 4/17 23:22:20  COM Port device handle: 3
> 4/17 23:22:20  COM Port DTE rate: 0 bps
> 4/17 23:22:20  Initializing modem:
> 4/17 23:22:20  Modem Command: AT&F
> 4/17 23:22:25  Modem Response TIMEOUT (5 seconds) on /dev/ttyS0
> 4/17 23:22:25  Retry #1: sending modem command (AT&F) on /dev/ttyS0
> 4/17 23:22:25  Modem Command: AT&F
> 4/17 23:22:30  Modem Response TIMEOUT (5 seconds) on /dev/ttyS0
> 4/17 23:22:30  Retry #2: sending modem command (AT&F) on /dev/ttyS0
> 4/17 23:22:30  Modem Command: AT&F
> 4/17 23:22:35  Modem Response TIMEOUT (5 seconds) on /dev/ttyS0
> 4/17 23:22:35  Modem command (AT&F) failure on /dev/ttyS0 (3 attempts)
> 4/17 23:22:35  Cleaning up ...
> 4/17 23:22:35  Done (handled 0 calls).
> 
> 
> Welcome to minicom 2.7.1
> 
> OPCIONES: I18n
> Compilado en May  6 2018, 08:02:47.
> Port /dev/ttyS0, 23:22:25
> 
> Presione CTRL-A Z para obtener ayuda sobre teclas especiales
> 
> atz
> OK
> ati3
> U.S. Robotics 56K FAX EXT V5.1.4
> 
> OK

You're not still running minicom while starting up sexpots are you, or
is something else maybe holding your tty device open?

If I have minicom running and try to start sexpots then the
initialization command is echoed there and not back to sexpots.

use losof of fuser on your /dev/ttyS0 device and see what else might be
using the device.
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