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Diffstat (limited to 'xpp/README.metering')
| -rw-r--r-- | xpp/README.metering | 50 |
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diff --git a/xpp/README.metering b/xpp/README.metering deleted file mode 100644 index 751d74f..0000000 --- a/xpp/README.metering +++ /dev/null @@ -1,50 +0,0 @@ -Astribank Metering Interface -"""""""""""""""""""""""""""" - -In analog phone lines, some PBX'es can generate/detect special tones -used for billing the call (phone metering). - -Astribank FXS and FXO drivers now support these features if compiled -with -DWITH_METERING - -Software interface: - FXS - To generate a metering pulse, write the channel number (0-7) into - the file: - - /proc/xpp/XBUS-nn/XPD-mm/metering_gen - - Where: - nn = XBUS number - mm = XPD number - - Writing channel number 31 signifies a broadcast -- i.e: generate - metering pulse on all channels. - - Example: - - echo 31 > /proc/xpp/XBUS-00/XPD-00/metering_gen - - FXO - To read current metering counters from an FXO, simply read: - - /proc/xpp/XBUS-nn/XPD-mm/metering_read - - The format is self documenting: - - # Chan Meter (since last read) - 0 5 - 1 0 - 2 12 - ... - - Reading this file reset the counters. So the numbers always show - the meters since last read. - - The metering register should be sampled at a rate which is double - than the highest expected metering pulses. This rate is adjustable - via a module parameter "poll_metering_interval". The current default - is 500ms which is good if the metering pulses are sent not more - often than once per second. - -Remark: The FXS hardware can generate maximum 0.85 volt RMS, while the FXO - needs a minimum of 1.1 volt RMS for detection. Therefore, this - feature cannot be tested in a loopback (Astribank-FXS to Astribank-FXO). |