How to enable Echo Cancellation on U1981.

This KB shows you how to enable Echo Cancellation in U1981.

Log in to the PBX using the LMT tool and run the show system voip argu algo <g711&g729&g723&ilbc_1520&ilbc_1333> to check whether the EC function is enabled.

System VoIP Arguments


PacketTime  : 20
                     EchoCancel  : [ON]
                    GainControl  : 14
             SilenceSuppression  : [OFF]
  JitterThreshold(min/max/init)  : 20(ms)/200(ms)/20(ms)
                      CRCswitch  : [NULL]


====  Command executed success !  ====

• If the status is OFF, run the config system voip algo <g711&g729&g723&ilbc_1520&ilbc_1333> echocancel on to open the EC function.
• If the status is ON, go to the next step.