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Echo on calls from landline to mobile


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Old 01-02-2015, 21:15
DJHS
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I have been troubled for some time by echo when using my mobile to answer calls from several landlines.

I use a Samsung S5 (SM-G900F) running Android 4.4.2.
The problem arises with incoming calls from landlines. I hear an echo of my voice when I speak. The landline person does not hear any echo.

I have just tested this with calls to and from three landlines on different rural exchanges involving six handsets of different types at the landline end.
When I call the landline, there is no echo.
When the same handset calls me, i hear an echo of my voice when i speak.

Can anyone please tell me what is going on and how we might address this problem.

Thanks
David
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Old 06-02-2015, 09:53
DJHS
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Am I really the only person seeing this problem?

I answer a call to my mobile from a land line in this rural area and every time I speak I hear an echo of my voice.

Any ideas anyone?
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Old 06-02-2015, 10:16
bigpete15
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Any comments I have heard of echos is usually from people using O2 or with the earpiece volume on their handset turned up to the maximum.
Another possibility is using a case on your handset, does that apply?
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Old 06-02-2015, 10:58
jaffboy151
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I used to hear this a few years ago on occasions, I was on O2 back then
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Old 06-02-2015, 11:15
chrisjr
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It could be the way the mobile and landline networks are interfaced. In mobile networks the audio from A to B is totally separate from the audio from B to A. So end B hears only A and end A hears only B

On a landline phone however A to B and B to A are mixed together on the same pair of wires. So both ends hear A + B (with no processing to try and separate A and B that is)

So it is quite possible that with no signal processing that when you call a landline what comes back to you is a mix of both you and the person you are calling. ie you get A + B because the two signals are present on the landline at the same time.

The interface kit though should be able to do A + B - A to cancel out the A (you) signal to leave B, the person you are calling. But the cancellation might not be perfect so you get a bit of A coming back. Which due to the delays in the mobile network will sound like an echo.

Quite why it should make a difference based on who calls who is another matter though.
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Old 06-02-2015, 14:52
lost boy
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I used to hear this a few years ago on occasions, I was on O2 back then
As did I - Vodafone in my case though (O2's quirk was crossed lines). According to a friend who's on Mobile by Sainsbury's (who use Vodafone's network) though it's still going on.

I have been troubled for some time by echo when using my mobile to answer calls from several landlines.

I use a Samsung S5 (SM-G900F) running Android 4.4.2.
The problem arises with incoming calls from landlines. I hear an echo of my voice when I speak. The landline person does not hear any echo.

I have just tested this with calls to and from three landlines on different rural exchanges involving six handsets of different types at the landline end.
When I call the landline, there is no echo.
When the same handset calls me, i hear an echo of my voice when i speak.

Can anyone please tell me what is going on and how we might address this problem.

Thanks
David
Does this happen when you're in a particular area, or wherever you may be? Have you tried a different mobile handset?
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Old 06-02-2015, 15:41
ard100
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Just tested this on a voda sim and mobile by sainsburys sim (runs on vodafone)

Both have the echo problem and sometimes missed calls this is connteced via 2g to a older base station which has microwave backhaul ,

I have been troubled for some time by echo when using my mobile to answer calls from several landlines.

I use a Samsung S5 (SM-G900F) running Android 4.4.2.
The problem arises with incoming calls from landlines. I hear an echo of my voice when I speak. The landline person does not hear any echo.

I have just tested this with calls to and from three landlines on different rural exchanges involving six handsets of different types at the landline end.
When I call the landline, there is no echo.
When the same handset calls me, i hear an echo of my voice when i speak.

Can anyone please tell me what is going on and how we might address this problem.

Thanks
David
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