Short Echo on Incoming PSTN Calls
robhouston:
I've been experiencing a small problem on inbound calls on my PSTN line for a couple of weeks, but I've only recently been able to test it thoroughly. On many inbound PSTN calls, but not all, for the first couple of seconds after I answer an incoming call, there is an annoying echo on the line (primarily my voice echoing). This disappears after a second or two, and then the call is normal, without echo for the remainder of the call. I've also noticed that when I access the PSTN line directly by using the # key, then dial a phone number, I sometimes have this same echo for the first digit or two, then remaining digits are dialed without the echo.
This occurs on all of my telephones, both wired and cordless. I believe this happens on roughly half of the incoming calls.
Any ideas of what is causing this and how to correct it? Thanks!
LeftRight:
Try to power off your OBi device, but have your phone still connected to PHONE port, then, check on both inbound and outbound PSTN calls, any difference on echo?
robhouston:
Thanks, but I've already done that. When the Obi is powered down, there is no echo on either inbound or outbound calls.
LeftRight:
Where is your OBi located? if outside of US, you might need to adjust LINE port AC impedence to match up local PSTN...
How is the echo level?
Note, LINE port has a default channel RX gain at 5 dB, you may bring it down to see if you can make this short echo less audible ... though it might result in lower volume on your handset ...
robhouston:
I'm located in the US. The echo is pretty irritating, but it is short-lived for each call (only the first few seconds of each call).
I haven't experimented with the Rx gain, but I'll give that a try.
Thanks for your help!
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