frangky robert
2012-Oct-05 13:15 UTC
[asterisk-users] asterisk-users Digest, Vol 99, Issue 9
> > 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.. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20121005/4f73cc77/attachment.htm>
frangky robert
2012-Oct-05 13:24 UTC
[asterisk-users] I can hear my own voice through the headset
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.. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20121005/9b09ba92/attachment.htm>