Hi, We're using PRO version 16SC, 15.5.3849.1 version. Our management have noticed that when we switched to 3CX - on the remote conferences voice delay became very large and now it's causing serious issues, people start talking over each other, interrupting and causing confusion. The best example is when two people are sitting next to each other and calling to a remote conference place with the client, they can hear a voice delay ~1.5s from VOIP. It was also noticed that when Fanvil X3s or X4 phones are used - they delay is much less and acceptable. PBX and users are located in the same office, G711 codec is used everywhere. The problem for us becomes very important and we are keen to help to resolve this with any possible way.