Incoming Calls forward to extension

I have this scenario I have Yeastar S300 and TG1600 GSM

What I want is in port 1 TG1600 where a sim card was inserted when an incoming call arrived it will be directed to extension local 101.

But the thing is I have also configured in Yeastar S300 incoming calls will be directed to IVR except for the incoming call of port 1 in TG1600 which will also be forwarded later on to IVR.

How to configure this? please someone shine a light on me.


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