We've had for many years now an on-premises 3CX installation with Cisco SPA525G2 phones. I now want the server to be cloud hosted with a provider like Amazon or OVH. Can I do this with my Cisco phones? Do I need to install the SBC and update the proxy settings on the phones? On one hand, 3CX provides this page that mentions the proxy settings: https://www.3cx.com/blog/voip-howto/configuring-sip-phone-as-tunnelled-external-extension/ On the other hand, 3CX points out that the Cisco phones have no SBC support. Any input would be greatly appreciated. Thanks!