Obi202 Echo Help Please
CoalMinerRetired:
Quote from: ipse on February 10, 2013, 11:00:34 am
I'm not an expert, but why would DNS play a role in his echo problem? Once the IP of the server is resolved, the rest is pure IP traffic, DNS is out of the picture.
I'd rather look into QoS and packet processing - I have an Obi110 and religiously configured QoS (MAC based) on ny Tomato router. No echo.
Agreed. Data packets do not repeat or duplicate themselves, so there's no way for a digitized/packetized 'slice in time' of speech to be sent a second or third time. That means echo comes from the analog components in the system, either on the sending end or the receiving end.
Note that the human speech to analog to digital processing on the sending end may very well introduce the echo, and in that case the same digitized speaking may be sent out multiple times, say with a 100 ms delay. But this is still not the same as data packets being sent twice or duplicated.
tpir72:
OK,
Tried:
DNS1: 4.2.2.2
DNS2: 8.8.8.8
Changed the default to 100mbps. Turned phone volume down.
No change what so ever. I still get echo to the point of being distracting.
I also get spotty call quality.
I have high speed internet too.
This can't be the norm for OBI202.
Thoughts anyone? Tech support never responded.
Regards,
Terry
CoalMinerRetired:
Note that these are the items mentioned in the linked article:
- Hold your hand over the mouthpiece. If the echo subsides then turn down the volume of the phone. *You should actually keep the volume turned fairly low regardless, as VoIP connections are extra sensitive and you will experience better quality by doing so.
- Move the IAD away from other electrical devices.
- Remove any splitters or separate caller ID devices between the IAD and the phone. In many cases this can cause echo that you hear on your end.
- Try using another phone cord, as some phone cables can be of poor quality.
- If you are using a cordless phone try to replace it with a corded phone (connected directly to the IAD and see if the echo stops.
And: Echo in telephony systems is caused by two main phenomena: the first is acoustic echo due to microphone pickup of audio. The second is electrical echo due to mismatched impedance.
Have you tried any of these?
Have you tried with a different analog phone and different modular phone cord from the phone to the Obi modular jack?
Lastly, what is the echo and sound quality like when you make a call GV in your browser, thus completely bypassing your Obi and your analog phone?
tpir72:
Done, no change - Hold your hand over the mouthpiece. If the echo subsides then turn down the volume of the phone. *You should actually keep the volume turned fairly low regardless, as VoIP connections are extra sensitive and you will experience better quality by doing so.
In the process of doing this - Move the IAD away from other electrical devices.
None there to remove - Remove any splitters or separate caller ID devices between the IAD and the phone. In many cases this can cause echo that you hear on your end.
Done, no change - Try using another phone cord, as some phone cables can be of poor quality.
Corded or Cordless the same - If you are using a cordless phone try to replace it with a corded phone (connected directly to the IAD and see if the echo stops.
Is it right to assume that there isn't a way to tweak this in expert mode of OBI202? - And: Echo in telephony systems is caused by two main phenomena: the first is acoustic echo due to microphone pickup of audio. The second is electrical echo due to mismatched impedance.
I have not tried this at all. I'll assume I'll need a headset with mic for this test - Lastly, what is the echo and sound quality like when you make a call GV in your browser, thus completely bypassing your Obi and your analog phone?
Thanks for the help (everyone)....
Regards,
Terry
CoalMinerRetired:
Quote from: tpir72 on February 17, 2013, 04:45:29 pm
I have not tried this at all. I'll assume I'll need a headset with mic for this test - Lastly, what is the echo and sound quality like when you make a call GV in your browser, thus completely bypassing your Obi and your analog phone?
Only if your computer does not have speakers (built in sound) and a built in mic. Almost every laptop sold in the last 10 years has this. Note that you can use any computer for this test.
The bigger picture point in all this is it's the analog components that create echo, your phone, handset, mic, phone cord, etc, etc. Once your voice gets digitized and sent out as an internet packet, there is no echo or duplication of the packet or repeating of the voice pattern that happens or could possibly happen. Therefore, look at the analog components. Isolate those components from the Obi and determine where the root cause is, divide and conquer.
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