IPO SE V10.1. - Connection via SIP Trunk fails

[zumbe]

We're trying to connect our C4B XPhone System to the Avaya IPO SE Version 10.1 via a SIP trunk. We can see the Invite going out in the System Monitor, but the Invite is missing the called and calling number.
Does anyone have a idea?

[sbhano]

Can you put system Monitor trace here ? Config file ? etc.

[zumbe]

here we go:

[zumbe]

Logs

please find attached log files