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How to Eliminate Echo on a VoIP Phone - SlideShare

Tuesday, February 10, 2015 - 12:00
VoIP Echo

Oh no…no…no, not again…a ’gain…a ‘gain! The dreaded echo while making a call – we’ve all experienced it, but what can you do to fix it?

What are the common causes of a VOIP echo and how do I fix them?

The most common cause of echo occurs when the receiver volume is turned too high on your telephone handset. To resolve this issue, try the following:

  1. Adjust your volume with the handset picked up during a phone conversation. Make sure that it is set at no more than 50% of the range, which is actually 100% of the volume coming in.
  2. After the party you are calling answers, lower the volume using the volume keys on the front of your telephone.
  3. On a Cisco IP telephone, you may lower the volume using the volume key.

Note: The small indicator block should be in the middle of the adjustment range. Higher handset volume levels are more likely to cause echo. Be sure to press the save button after you have placed the volume at the correct level.

Problems Converting Analog Signal to Digital

The second most common cause is due to the signal conversion process that takes place between an analog telephone line and a digital telephone line. When you place a phone call to a location that does not have digital telephone switches at the local telephone company (such as a small town without digital infrastructure), lines at the remote end can cause cross-talk or sound going between the transmit and receive side of the telephone line.

Using Echo Cancellers to Stop the Echo

To help solve this type of echo we use what are known as “echo cancellers.” These echo cancellers will start working as soon as the phone call is placed and will eliminate most of the echo within the first 8 to 10 seconds of the telephone conversation. We have implemented a 100% digital infrastructure, through our VoIP Phone hosted infrastructure options, giving you the clearest connection possible.

Sometimes, multiple parties will be experiencing delays and/or echoes from the two previous scenarios or for other reasons. In a conversation, echo is almost always caused by the person who does not hear it on their end! If you are on a conference call with 20 people and 19 hear an echo.

Most likely, when the person who is the source (and is likely not hearing the echo) hangs up, the echo will go away for everyone. You may have experienced this “echo effect” during calls over your digital cell phone.

If you have already checked everything from your end, you can be confident the issue lies with someone else on the call.

There may be some rare cases where adjusting handset volume doesn’t work or where echo cancelers can’t remove 100% of the problem. When that is the case, you can always try the computer fix employed by Service Desk technicians the world over: reboot (hang up and try again)!


Is there a way to prevent VOIP echo?

Voice over IP (VoIP) Gateways and other digital infrastructure, like those at West Unified Communications, include a line echo canceler to remove or reduce the echo level from analog loops. And while VoIP echo is not always preventable, having the hardware and infrastructure in place and configured properly, via end-user phone settings and back-end digital equipment, can help to stop echo, echo, ec…right in its tracks.


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