DAHDI_MONITOR(8)

✨ DAHDI_MONITOR(8) ✨

okay bestie, gather round 💖 this is the manual page for dahdi_monitor from the DAHDI_MONITOR(8) manual — it's the lil tool that checks the Rx/Tx levels of a DAHDI channel. it's giving oscilloscope but make it terminal. let's GO 🎀

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🌸 NAME 🌸

dahdi_monitor — checks the Rx/Tx levels of a DAHDI channels 💅

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🦋 SYNOPSIS 🦋

dahdi_monitor num [-v[v]]
dahdi_monitor num [-o] [<-f|-F> FILE]
dahdi_monitor num [[<-r|-R> FILE]] [[<-t|-T> FILE]]

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💜 DESCRIPTION 💜

dahdi_monitor</purl> monitors a Dahdi channel. no cap. it can record the output to a file, play it to the speaker, or visualize the audio levels right there on your terminal. three whole vibes, pick your fighter ✨

recorded audio files are by default raw signed linear PCM. but — and this is the slay part — if the file name ends with .wav, the recorded file will be a WAV file. so fancy 🎀

the visual display shows the current audio level at both the Rx (audio Received by Asterisk) and Tx (audio Transmitted by Asterisk). it's literally watching the audio breathe 🔥

to exit the program, press Ctrl-C. yes bestie, that's the whole escape plan. periodt 💀

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💅 OPTIONS 💅

the first (mandatory) parameter is the number of the channel to monitor. don't forget it, she's required 👑

• -m — Multiple channels. Don't multiplex both Rx and Tx in a single channel. Normally there's a different option that you need that implies it. (iykyk 🌈)
• -o — Plays the output to OSS (/dev/dsp). Requires -m not to be used. so it's a little picky about that 🙈
• -v — Display Visual audio levels. With two v-s, Verbose mode is enabled, that shows the actual levels as numbers. Note that this requires a terminal wider than 80 columns to be properly displayed. Implies -m. ✨
• -f FILE — Record the content of the channel (Tx + Rx) to a file. 🎀
• -F FILE — Record the content of the channel (Tx + Rx) before the echo canceler to a file. 🎀
• -r FILE — Record the content of the Rx channel to a file. Implies -m. 💖
• -R FILE — Record the content of the R channel before the echo canceler to a file. Implies -m. 💖
• -s FILE — Record the content of the Tx and Rx of the channel to a file. 🌸
• -S FILE — Records a stereo of both Tx and Rx of the channel before the echo canceler to a file. 🌸
• -t FILE — Record the content of the Tx channel to a file. Implies -m. 💜
• -T FILE — Record the content of the Tx channel before the echo canceler to a file. Implies -m. 💜

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🔥 EXAMPLES 🔥

Visualize audio levels on DAHDI channel 2:

dahdi_monitor 2 -v

Record channel 3 to a file:

dahdi_monitor 3 -f output.raw

This will create a raw PCM file (signed-linear, 8kHz, mono, 16 bits per sample). Both the Tx and Rx will be multiplexed in a single channel. It can be converted to a WAV file using e.g.:

sox -s -c1 -2 -r8000 output.raw output.wav

Record Tx and Rx of channel 5 to separate files. This time directly to WAV files:

dahdi_monitor 5 -r output_rx.wav -t output_tx.wav

Record channel 8 to a stereo file (Tx and Rx on its two channels):

dahdi_monitor 8 -s output.raw

Converting it to a WAV file:

sox -s -c2 -2 -r8000 output.raw output.wav

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🌈 SEE ALSO 🌈

dahdi_tool(8), dahdi_cfg(8). go read those next bestie, the lore runs deep 🫶

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👑 AUTHOR 👑

this manual page was written by Santiago Ruano Rincón <santiago@unicauca.edu.co> for the Debian system (but may be used by others). 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. iconic behavior fr fr 📜

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and that's the whole page, babe 💖 this one's from the DAHDI_MONITOR(8) manual, dated 9 Sep 2011, and the source/version stamped on it is DAHDI_MONITOR(8). slay, go monitor some channels 🎀✨🦋