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Knowledge Base

FAQ: how to reducce the rustle when make a outgoing call with IAD132E

Publication Date:  2015-11-15  |   Views:  225  |   Downloads:  0  |   Author:  h00453638  |   Document ID:  EKB1000089887


Issue Description

A customer site, customer make a outgoing call to user A with AT0 trunk by IAD132E. user A hear rustle sound always.


usually this is a common issue for all IAD version and there are 3 ways to reduce the rustle.

1. Ensure that the IAD132E(T) is properly grounded.

2.Run the command  pstnport attribute set slot <0-6> port <0-31> {<Enable,Disable> | <Ordinary,Reverse> | <0-17>} to adjust the FXO port send gain. the command  dsp vad-enable off to close the comfortable noise. ---Mute detection switch. The mute detector determines whether to set the sample frame as a muting frame or a talking frame according to the estimated volume. In this way, the mute detector can detect the intermission duration in the conversation and stop sending voice packets. Therefore, a large amount of precious network broadband resource can be saved