[asterisk-users] I can hear my own voice through the headset

[frangky robert]

Sorry for my last post,




> > Here is my IP-PBX setupmy setup is : sips softphone <-> asterisk <-> xorcom PSTN gateway <-> pstn line to telcoi'm using xlite for windows
> 
> > when I make a phone call (sip - outgoing channel),I can hear my own voice so clear. it's very annoying mewhen talking a little loud... any solution? 
> 
> Two questions:
> 
> (1) Does the problem occur when you make a SIP-to-SIP call, without
>     the PSTN being involved?

No, it's happened only when I make a call from sip to pstn line.

> (2) When you hear your own voice in the headset, is it delayed, or
>     is just an immediate louder-than-you-want "side-tone"?

it's immediate voice and very clear, just like "talk-to-my-ear" with no delay
> If it *does* occur in SIP-to-SIP calls, this would rule out your
> XORCOM and the PSTN as the cause.  If it's only occurring in
> SIP-to-PSTN calls, then the XORCOM and PSTN (or the interaction
> between them) is a likely suspect.
> 
> There are several things which can cause this sort of problem.
> 
> (A) Direct acoustic feedback within the headset.  In this case, you'd
>     probably hear it even if the headset was unplugged entirely.  The
>     only cure is to buy a better headset.
> 
> (B) Incorrect audio-mixer settings in your PC.  To the PC audio
>     infrastructure, a headset usually "looks like" a microphone
>     and a separate speaker.  The audio mixer (hardware and software)
>     usually has an ability to mix some of what the microphone "hears"
>     into the speaker output.  If this "knob" is turned up too high,
>     you'll hear your own voice too loudly.  If too low, you won't
>     hear your own voice at all when you speak into the headset, and
>     many people find this lack of side-tone to be confusing.
> 
>     The cure here is to adjust the audio side-tone level, either
>     in your Windows audio-mixer control panel, or in X-Lite (if
>     it has such an adjustment).
> 
> (C) Electrical "reflection" from an analog impedance discontinuity
>     in the analog telephone-line system.  This can result from
>     a mismatch between the telephone wiring, and the PSTN interface
>     device, and can occur at any point in the analog transmission.
> 
>     If the loud side-tone you hear is *not* delayed noticeably,
>     then the impedance mismatch might be at your XORCOM/PSTN
>     interface.  The XORCOM may have a software adjustment or
>     jumper setting, to match its audio impedance to that of your
>     local phone line... try fiddling with these settings to see
>     if they reduce the excessive side-tone level.
> 
>     If the loud side-tone you hear is delayed (it sounds a bit
>     like an echo) then it may very well be at the "far end" of
>     the phone line, outside of your own physical control... it
>     might be at your local phone office, or anywhere between you
>     and the far end of the phone connection.  Not much you can do
>     about this.
> 
> (D) Audio feedback at the far end of the call, in a cheap phone
>     handset.  Sometimes, audio from the "back side" of the speaker
>     in a handset travels through the body of the handset and is
>     picked up by the microphone, and results in an audible delayed
>     "echo" of the voice from the far end of the line.  Using a
>     better handset, or stuffing the handset full of audio damping
>     material (cloth or cotton or fiberglass) is the cure here.

Well, thanks a lot Lee for suggestion and explanation, I'll try this tommorow.

> 
> We've often faced this problem with SIP soft phones when the computer's 
> sound system gain was set too high.  You usually have to play around 
> with microphone gain settings to get to the point where the echo 
> disappears with the other party still being able to hear you.

And thanks for your share Raj, I appreciate that.. 		 	   		   		 	   		  
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