Call forwarding does not work on the analog gateway. What parameters need to be changed in order for the gateway to work with the PBX?

Question

ATS

Good afternoon.
PBX: UCM6510 from Grandstream.
Analog Gateway: GXW4248 , also from Grandstream.
When calling from analog phones to external numbers, you can transfer the call to an internal number. And if it's set, you can't.
But - when calling from an external number directly through the PBX (X-Lite checked from a computer), you can transfer calls.
What needs to be done so that the gateway works stably together with the PBX?
Current settings:
PBX: IP - 192.168.1.1
Gateway:

As I understand it, everything is fine with the PBX, all that remains is to change some data from the gateway ... I'm not very strong in this area, please help *О*

Answer 1

The question is not entirely clear. Can be more?
Preferably with an example.
And more, tell about symptoms, please. What happens when you try to transfer a call? Cliff? At what moment?