No output voice sip hardphone -> * ->


I’m having troubles making calls using my sip hardware thomson 2030, asterisk server and sip account. I hear people speaking but people can not hear me. Everything else works perfect:
intranet sip soft -> TDM400 landphones
intranet sip hard -> TDM400 landphones
intranet sip soft -> landphones
outside landphone provider -> TDM400 asterisk board -> sip.voipcheap landphone (asterisk forwarding from TDM400 incomming call to landphone)

The error is just using sip hardphone.

This is my network schema:
This is my router NAT configuration:

Any idea?


any idea on this issue? Maybe some way to configure my thomson