---
name: "dahdi_maint"
section: "8"
platform: "linux"
package: "dahdi"
version: "1:3.1.0-2.1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/dahdi_maint"
---

# dahdi\_maint(8)

Sets Dahdi spans into maintenance mode, e.g.: loopback

## NAME

dahdi\_maint - Sets Dahdi spans into maintenance mode, e.g.: loopback

## SYNOPSIS

**dahdi\_maint -s *num* \[options\]** **dahdi\_maint \<-h\|--help\>**

## DESCRIPTION

dahdi\_maint uses the DAHDI\_MAINT interface to set a Dahdi span (port of a Dahdi adapter card) into loopback mode or similar maintenance mode.

## OPTIONS

- **-s --span *num***

  The span number. Required.

- **-l --loopback \<localhost\|networkline\|networkpayload\|loopup\|loopdown\|off\>**

  Loopback type. One of:

  - localhost

    loop back towards host

  - networkline

    network line loopback

  - networkpayload

    network payload loopback

  - loopup

    transmit loopup signal

  - loopdown

    transmit loopdown signal

  - off

    end loopback mode

- **-i --insert \<fas\|multi\|crc\|cas\|prbs\|bipolar\>**

  Insert an error of a specific type

## EXAMPLES

Enable network line loopback on span 1:

  dahdi\_maint -s 1 --loopback networkline

Disable network line loopback on span 1:

  dahdi\_maint -s 1 --loopback off

## SEE ALSO

[dahdi\_tool(8)](/dahdi_tool/8.md), [dahdi\_cfg(8)](/dahdi_cfg/8.md), [asterisk(8)](/asterisk/8.md).

## AUTHOR

This manual page was written by Tzafrir Cohen \<tzafrir.cohen@xorcom.com\>. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later version published by the Free Software Foundation.