S20 Problems

We have changed our MyPBX Soho to a S20 and now getting Problems with Clip-No-Screening. We have 1 Trunk Provider (Deutsche Telefon AG) who needs P-Prefered-Identity or CallerName for Clip-No-Screening. 

The MyPBX Soho don't support P-Prefered-Identity so we changed CallerName in From Field which worked like a charm.

But with the new S-Series we getting this not to work.


Any Suggestions? Can i do some custom configuration to send something like this:

SIPAddHeader(P-Preferred-Identity: NUMBER)


Greets from Germany


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