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Avaya A-Law vs Mu-Law Digital Interface

Avaya A-Law vs Mu-Law Digital Interface

Avaya A-Law vs Mu-Law Digital Interface

Does any tech have experience with the Polycom/Avaya 2490 digital conference phone ... using the A-Law digital interface module ... in the US?

The volume is alot higher on the A-law ... as compared to the MU-Law model - and it can't be turned down properly?

I'm guessing its an internal circuit board component difference.

I think there are DIP switches under the main label ... just can't find any docs to explain what they do??

Just got a couple boxes of the A-law dig mods in and am trying to use them here in the US.

Any tricks anyone knows?


RE: Avaya A-Law vs Mu-Law Digital Interface

In the USA you should be using u-law

RE: Avaya A-Law vs Mu-Law Digital Interface

Ok - I figured it out.

On the back on the 2490's digital interface mod - there is a small 3/4" square sticker covering a set of (3) DIP switches.

Peal the small label cover off ...

A-LAW Intl model has all (3) set to ON

Ulaw - US model needs all (3) to be set to OFF

They worked fine after the DIP switch adjustment!

RE: Avaya A-Law vs Mu-Law Digital Interface

Thanks for the update

RE: Avaya A-Law vs Mu-Law Digital Interface

Thanks for coming back and posting your solution - star'd

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