Have an IVR box with a Voice card (NMS) that uses a built in echo cancellor. It appears we still hear a very noticeable echo on the lines that impact Speech Recognition. I assume echo can be cancelled in other areas of the Telco infrastructure. For example, do certain switches have a built in echo cancellor capability? Can somebody provide any insights on how to go about troubleshooting for echo on the lines?
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Echo troubleshooting methods
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