gsm0710muxd8

Usage

Overview

A GSM muxer is needed to keep a PPP/GPRS up & running while sms and calls are still signaled on another channel. Some modems even support using GPRS while a call is active, others suspend GPRS during calls.

The muxer supports various options to change the behaviour for different modems. Use -h to see a brief help screen.

All logging is done through syslog, see the syslog for errors and warnings.

Options

-d

Fork, get a daemon (default: no)

-v

Verboser logging (give twice for even more verbose)

-s <serial port name>

Serial port device to connect to (default: /dev/modem)

-t <timeout>

reset modem after this number of seconds of silence (default: 0)

-P <pin-code>

PIN code to unlock SIM (default: <not set>). This is normally not needed but some modems need the pin before enabling the muxer mode.

-p <number>

use ping and reset modem after this number of unanswered pings (default: 0)

-l <filename>

set logfile name (default: <not set>)

-x <dir>

power management base dir (default: <not set>)

-a <mode>

additional_functionality (default: 0). This is a bit-set enabling quirks for different modem. The quirks are: WAKEUP_WITH_SYSFS = 1, WAKEUP_WITH_SEQUENCE = 2, SIEMENS_C35 = 4, ENFORA = 8, SHORT_INIT = 16.

-b <baudrate>

muxer-mode baudrate (default: 115200)

-B <baudrate>

serial port baudrate (default: 115200)

-m <mode>

Mode (basic, advanced) (default: advanced)

-f <framsize>

Frame size (default: 64)

-h

Show a help message and display current settings.

Bugs/limitations

gsm0710muxd There may accure bufferoverruns and thus missing data between muxer and client under certain situations.

Some settings could be determined by a AT-command at startup. This wouldn't be much reliable because modems often lie so i did not invest to much work in this.