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.TH "DAHDI_MONITOR" "8" "16 June 2008" "" ""
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.TH "DAHDI_MONITOR" "8" "9 Sep 2011" "" ""
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dahdi_monitor \- checks the rx/tx levels of DAHDI channels
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dahdi_monitor \- checks the Rx/Tx levels of a DAHDI channels
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.B dahdi_monitor \fIchannel number\fB [\-v] [\-f \fIFILE\fB]
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.B dahdi_monitor \fInum\fB [\-v[v]]
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.B dahdi_monitor \fInum\fB [\-o] [<\-f|\-F> \fIFILE\fB]
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.B dahdi_monitor \fInum\fB [[<\-r|\-R> \fIFILE\fB]] [[<\-t|\-T> \fIFILE\fB]]
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dahdi_monitor monitors a DAHDI channel. It gives you a visual
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representation of the sound strengths and makes it easy to see if
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the received or transmitted signals are too high or out of
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dahdi_monitor monitors a Dahdi channel. It can record the output to a
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file, play it to the speaker, or visualize the audio levels on the
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Recorded audio files are by default raw signed linear PCM. If the file
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name ends with ".wav", the recorded file will be a WAV file.
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The visual display shows the current audio level at both the Rx
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(audio Received by Asterisk) and
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Tx (audio Transmitted by Asterisk)
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To exit the program, press Ctrl-C.
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The first (mandatory) parameter is the number of the channel
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Multiple channels. Don't multiplex both Rx and Tx in a single channel.
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Normally there's a different option that you need that implies it.
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Plays the output to OSS (/dev/dsp). Requires -m not to be used.
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Display visual audio levels.
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Display Visual audio levels. With two v-s, Verbose mode is enabled, that
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shows the actual levels as numbers. Note that this requires a terminal
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wider than 80 columns to be properly displayed.
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Some extra, yet undocumented, options.
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Record the content of the channel (Tx + Rx) to a file.
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Record the content of the channel (Tx + Rx) before the echo canceler
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Record the content of the Rx channel to a file.
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Record the content of the R channel before the echo canceler to a file.
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Record the content of the Tx and Rx of the channel to a file.
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Records a stereo of both Tx and Rx of the channel before the echo
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Record the content of the Tx channel to a file.
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Record the content of the Tx channel before the echo canceler to a file.
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Visualize audio levels on DAHDI channel 2:
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Record channel 3 to a file:
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dahdi_monitor 3 -f output.raw
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This will create a raw PCM file (signed-linear, 8kHz, mono, 16 bits per
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sample). Both the Tx and Rx will be multiplexed in a single channel.
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It can be converted to a WAV file using e.g.:
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sox -s -c1 -2 -r8000 output.raw output.wav
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Record Tx and Rx of channel 5 to separate files. This time directly to
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dahdi_monitor 5 -r output_rx.wav -t output_tx.wav
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Record channel 8 to a stereo file (Tx and Rx on its two channels):
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dahdi_monitor 8 -s output.raw
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Converting it to a WAV file:
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sox -s -c2 -2 -r8000 output.raw output.wav
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dahdi_tool(8), dahdi_cfg(8), asterisk(8).
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dahdi_tool(8), dahdi_cfg(8).