Setup for Grandstream HT-802

I went to T-Moble and lost port forwarding. I got the subscription to localxpose and have attempted, without success, to get my HT-802 VOIP to Analog box I use with 3CX PBX system.

Can someone point me to a document that will step me through the procedure of how to setup? I did the account login, I created TCP ports (HT-802 set for TCP) for SIP and RTP. I connect, but the audio is not working, i.e. I’m registered but cannot talk.

Any assistance would be appreciated.