I really don't get it ....

From several emails in this list archive, I had clearly understood that it is important to switch Echo Cancellation off for fax-channels, or faxing would not work properly.

However, faxing (B410P ISDN bridged to TE410P PSTN) seems to work fine with EC at 256 taps on the B410P.

I am confused; can anyone enlighten me?

Thank you!

Z.

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Zoilo Gomez wrote:
We have recently purchased a B410P Digium 4* ISDN-2 card with hardware EC.

On the same server, I also have a regular Digium 4-channel PSTN-card (TDM410P ?), used to interface to some analog devices, a.o. 2 fax machines.

For faxing, EC needs to be off (or so I understand from the archives).

How can I switch EC off for an ISDN B-channel if a fax is coming in?

Z.

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