Yealink T42G on Wildix PBX

[filya]

Hi,

Would need some help on configuring T42G on Wildix W40 PBX.
The problem is as follows:
1) the phone is registering on PBX, was connected from internal LAN and external (via Internet from home), gives the same results
it results registered on PBX and on the phone.
2) when trying to make a call from the phone to internal or external number, this gives no result, message on the display (Not allowed here)
3) when trying to call to the T42G phone from another phone on the network, the T42G is ringing, but when answered the other phone does not see that the call was answered, and on T42G there are no sound coming out and in, but time is ticking as the call is in progress
4) tried to setup soft-phones on iPhone and on other PC getting to PBX via Internet with the same account like T42G, and in both cases all is working fluently (can make and receive calls without any problem)
5) other Wildix phones that are on the network like WP480 or WP490 are working fine in both cases, if these are connected via Internet or in the internal LAN
6) Setting up T42G with another VOIP provider works great, can call and receive calls

So, the question is what I'm doing wrong?
Is there some particular setup that I'm missing?
Thanks for any help.