Solved I hear an echo in my Plantronics CS540. How do I fix this?

Plantronics, inc Cs540 headset
August 22, 2019 at 03:47:43
Specs: Windows 10, 2 GB
Try any of the following:

Lower the listening volume on the phone.

If the issue persists, lower the transmit volume on the base. For most telephones, the correct setting is 3.

If the audio level is too low in this position, adjust the headset volume control to increase the headset speaker volume.

If your speaking volume is too low for your listener in this position, adjust the position of the headset to make sure the microphone is two finger’s width from the corner of your mouth.

Note If you don’t hear an echo but your callers report an echo, adjust the configuration switch. The most commonly used position is “A”.


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#1
August 22, 2019 at 05:51:24
✔ Best Answer
Echo (one's own voice especially) on a phone can be due to an imbalance in the actual phone cct. in use - the cct. from the phone company to/from the phone at either end...

The way incoming/outgoing signals share the line, the actual cct,. is simple in essence, but does require the two signals are balanced - equal in levels.

These days there are many bits of kit in a given phone call and any of them might be out of balance.... Not that common an effect today (unlike in days of yore...) but nonetheless there; and more often evident on long distance calls - although even local calls on occasion.

I used to build telephone interface boxes - very simple devices using appropriate transformers and a balance pot (potentiometer) between them. The full monty version has more than just a balance pot between the; but a simple "pot. works for many systems - as long as you pay heed to line level outgoing... They allowed the user to inject any external audio signal into the phone line...; in place of, or along side, the actual phone itself and the caller.

They can be made using very simple "op-amp" chips too; and again require a balance pot between the two halves/signals.

The devices (modern or "ancient') allow a little of the outgoing signal to mix with the incoming; so as to enable the caller out going to hear him/herself and thus be more comfortable during the call.

They can be bought of course; and usually not cheap... as they have to conform to specific rules/specs...

They are standard equipment in every broadcast station around the world.

Phone companies have strict controls of the signal level permitted over the ccts.; primarily to prevent cross talk and interference with other signals... FCC rules etc. in USA, DOT in Canada; and whatever department in the UK and the rest of the world...


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