Hey guys ! We have a system that's been running quite good for 2 months now but the client is reporting a strange thing we cant fix. the outbound calls have a latency when the remote callee picks up the call and says "hello", we are missing the first words being said for 1 or 2 seconds, this is very annoying cause we miss the greetings of the callee. the strangest part of this problem is that it does not do it with an older generation of Cisco phones( spa942 ) or the 3CX Windows phone. the phones are CISCO spa303G and the jitter or packets settings are as recommended by 3CX, we also tried all combinations of jitter and packets but we can only get the buffer or lag worst. We also tried PBX delivers audio and other recommendations from the forum with no success. We are using a VOIP provider service for outbound lines ( broadconnect - Canada ) and a PSTN Gateway for inbound ( grandstream GXW-4104 ). 3CX is on version 10 and configured like all our other installs. Is there a way to reduce the buffer on the outbound calls ? I noticed there is record buffer and play buffer on the 3CX phone app, is there an equivalent on hardware phone such as the SPA303g ? Note that inbound calls also suffer from a minor buffer lag when local receptionnist answers but it is much less than the outbound one. This might be due to the fact we use different services for inbound and outbound. anyone ? Thx !