---
name: "modemtest"
section: "1p"
platform: "linux"
package: "perl-device-serialport"
version: "1.04-22"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/modemtest"
---

# modemtest(1p)

Tool to examining your modem through Perl's Device::SerialPort

## NAME

modemtest - Tool to examining your modem through Perl's Device::SerialPort

## SYNOPSIS

modemtest \[OPTS\] \[DEVICE \[BAUD \[DATA \[PARITY \[STOP \[FLOW\]\]\]\]\]\]

```
 DEVICE    Device to use as a serial port (default: "/dev/modem")
 BAUD      Serial speed to use            (default: 9600)
 DATA      Number of databits to use      (default: 8)
 PARITY    Type of parity to use          (default: "none")
 STOP      Number of stop bits to use     (default: 1)
 FLOW      Kind of flow control to use    (default: "none")
 -h, --help           Help report
     --skip-status    Skip modem status bit tests
     --hide-possible  Don't show all possible settings
```

## DESCRIPTION

Some systems, serial ports, and modem behave in strange ways.  To test the capabilities of Perl's Device::SerialPort, this tool queries the system settings for the given DEVICE, and attempts to set up the port and send the initialization string "ATE1" to the modem, reporting the results seen.

## SEE ALSO

**Device::SerialPort**(3)

[**perl**(1)](/perl/1.md)

## AUTHOR

Kees Cook \<kees@outflux.net\>.

## COPYRIGHT AND LICENSE

Copyright 2000-2004 by Kees Cook \<kees@outflux.net\>.

This program is free software; you may redistribute it and/or modify it under the same terms ans Perl itself.