IP Phone is only working with non-tunnel connections

[lti_2006]

Hi,

We're in the process of implementing a new 3CX phone system hosted in Azure, and I've noticed that the phones get provisioned, but they're online when I disable the "Block remote non-tunnel connections" option. I'm using a Yealink T34W. Any reason for this? Is there a way to have it work with the block remote non-tunnel connections enabled?

 

[lti_2006]

I did some research, and it seems as though we need to use an SBC. I'll get it configured, and hopefully it works as designed.

 

[KyriacosS_3CX]

Hi,

And once you see that it does work, which I am sure you will, don't forget to re-enable the Block for non-tunnel!

Best,
KS.

 

[lti_2006]

Thanks for the feedback. We used a Linux-based implementation for the SBC, and everything works as expected with the block for non-tunnel enabled.