I have a 3cx on a site and I have been trying to add a grandstream 2130. The 3cx just won’t see the device. The site currently has 4 of the same model working fine. Site was installed on v14 and I have upgraded them to v15 not that long ago. Phone has been tested on a v14 site and shows up in 3cx fine. I have tried setting manual provisioning on the phone pointing to the 3cx and it’s a no go. I can see the phone in modems arp table and can access the web interface using ip address, both phone and 3cx are on same switch. I have tempted both the 3cx and GP2130 with bacon and they still refuse to talk with each other…Yep Any ideas or heard of anything similar?