Echo after 4.2.11 Upgrade

[paul3461000]

Upgraded 406v2 Unit from 4.1.12 to 4.2.11

Using VCM 5 card. Using G.711 Codec.

IP Phones were working perfectly. Now have an Echo when calling to/from analogue lines using IP phones. Do not have the echo when calling in-house or using SIP trunks.

Echo starts out really bad and then improves after a few seconds but never entirely goes away.

Tried adjusting the gain and echo cancellation on the lines. Also tried changing all the settings under teh System/VCM tab. Nothing seems to get rid of the echo.

I am looking for suggestions for other things to try before I back-rev this thing.

 

[Bas1234]

Is the IPOffice grounded?

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It works! Now if only I could remember what I did...
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[intrigrant]

replace the vcm with a vcm 4 or 8
what kind of analog trunk card do you have

 

[paul3461000]

The trunk is an ATM4 card.

 

[telecomtekperson]

Did you run the Impedence matching?

http://www.telemanuals.com

 

[paul3461000]

Can Impedance Matching be done on a 406v2? or is that only available for the IP500.

 

[Westi]

only on the IP 500 with the new ATM4 card

Joe W.

FHandw., ACS

If you can't be good, be good at it!