Verify that hardware echo canceller is off during faxing

Owned by Nathaniel Halbrooks
Jan 08, 2024
2 min read

To check if the EC is turning itself off during a fax or data call you can run the command below. Replace "X" with the wanpipe number and "Y" with the channel relative to the span. This command will give you full details from the DSP about the specified channel. To see if the EC is being disabled run the command during a fax and you should see "Tone Disabler Status" set to "Disabled". If you see "Tone Disabler Status" set to "Enabled" then this means the EC is currently attempting to remove echo from the channel. 

-> wan_ec_client wanpipeX stats Y

wan_ec_client wanpipeX stats Y    eg. root@localhost ~]# wan_ec_client wanpipe1 stats 1 wanpipe1: Running Get stats command to Echo Canceller device... Done!   wanpipe1: 1: Echo Channel Operation Mode : NORMAL wanpipe1: 1: Enable Tone Disabler : TRUE wanpipe1: 1: Mute Ports : NONE wanpipe1: 1: Enable Extended Tone Detection : FALSE wanpipe1: 1: Tone Disabler Status : Enabled wanpipe1: 1: Voice activity is detected on SIN port : FALSE wanpipe1: 1: Echo canceller has detected and converged : FALSE wanpipe1: 1: Average power of signal level on RIN : -57 dBm0 wanpipe1: 1: Average power of signal level on SIN : -66 dBm0 wanpipe1: 1: Current gain applied to signal level on RIN : 0 dB wanpipe1: 1: Current gain applied to signal level on SOUT : 0 dB wanpipe1: 1: Average power of the comfort noise injected : -63 dBm0 wanpipe1: 1: (TDM) PCM Law type on SIN : ALAW wanpipe1: 1: (TDM) TDM timeslot on SIN port : 0 wanpipe1: 1: (TDM) TDM stream on SIN port : 6 wanpipe1: 1: (TDM) PCM Law type on RIN : ALAW wanpipe1: 1: (TDM) TDM timeslot on RIN port : 0 wanpipe1: 1: (TDM) TDM stream on RIN port : 4 wanpipe1: 1: (TDM) PCM Law type on SOUT : ALAW wanpipe1: 1: (TDM) TDM timeslot on SOUT port : 0 wanpipe1: 1: (TDM) TDM stream on SOUT port : 7 wanpipe1: 1: (TDM) PCM Law type on ROUT : ALAW wanpipe1: 1: (TDM) TDM timeslot on ROUT port : 0 wanpipe1: 1: (TDM) TDM stream on ROUT port : 5 wanpipe1: 1: (VQE) NLP status : TRUE wanpipe1: 1: (VQE) Tail Displacement Status : FALSE wanpipe1: 1: (VQE) Tail Displacement (ms) : 0 wanpipe1: 1: (VQE) Tail Length (ms) : 128 wanpipe1: 1: (VQE) Comfort noise mode : NORMAL wanpipe1: 1: (VQE) Acoustic Echo : FALSE wanpipe1: 1: (VQE) Out Automatic Level Control : FALSE wanpipe1: 1: (VQE) Out Automatic Level Control Target : -20 dB wanpipe1: 1: (VQE) In Automatic Level Control : FALSE wanpipe1: 1: (VQE) In Automatic Level Control Target : -20 dB wanpipe1: 1: (VQE) Noise Reduction : FALSE wanpipe1: 1: (VQE) Tone Removal : FALSE wanpipe1: 1: (VQE) Activation Delay (ms) : 1836

 

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