---
name: "gsm0710muxd"
section: "8"
platform: "linux"
package: "gsm0710muxd"
version: "1.13-3+b1"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/gsm0710muxd/8"
---

# gsm0710muxd(8)

a GSM 07.10 muxer

## NAME

gsm0710muxd - a GSM 07.10 muxer

## SYNOPSIS

**gsm0710muxd \[options\]**

## DESCRIPTION

**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.

## COMMAND-LINE 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.

## HISTORY

The name 'gsm0710muxd' was chosen because the GSM specs describe this method in document 7.10.

## 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.

## AUTHOR

M. Dietrich \<mdt@pyneo.org\>

## SEE ALSO

[ptsname(3)](/ptsname/3.md)