After update silent, no SIP Ringing (VS-GW1600)

Hello,
After update 2.3.1 I have problem with calls:
100 Trying
183 Session Progress
That's all. Gateway registered (client) on my PBX. Call from PBX to mobile phone through Gateway. No ringing. If I hand up mobile duration going but I can't listen any thing. I'll try downgrade it's ok. Update and factory reset don't help me.

Sorry for my English

Hi sir,

Could you give me remote access for checking? I will help you to figure it out.
For convenient contact, please add my skype. My skype id is linda.li258

Best regards,
linda
email: This email address is being protected from spambots. You need JavaScript enabled to view it.

I'm facing the same issue, where you able to resolve this? I spent hours with linda on this topic, my device is outside the PBX network, when I was on 2.2.2 everything worked fine, as soon as I updated to 2.3.1 I lost voice. I then downgraded to 2.2.2 and things started working again. If I call from inside the network and directly to the box, everything works fine. If you guys cameup with a solution please let me know.

I can help you. Do you speak Russian?

Thanks for your response. No I don't speak Russian but u seem to speak a good English

I'd appreciate your help

Hi sir,

Please check your skype. I sent the solution to you via skype. Please contact me when your skype is online.
Sorry again for the trouble.

Best regards