Hi, I already have a ticket opened with Snom but I'm asking here to see if anyone else has this problem. After being connected a day or two, there seems to be a problem with all our Snom 300, 320 and 370 phones. When someone places a call, the first 1-2 seconds of the conversation are lost. This mean that our users often miss the "Hello" of the person they are trying to reach, causing some frustration as the person at the other end of the line has to say "Hello" a second time, or sometimes they just hang up. If the phone is rebooted, the problem seems to go away for a few days. The same thing happens when checking voicemail: the prompt message starts while the phone is still ringing, so the first 1-2 seconds are lost. Sometimes, there is even a full ring after the voicemail prompt has started. Here is the answer I got from Snom after sending some packet capture: "The difference which I managed to see by comparing the 2 traces was that the phone sends the acknowlidgement packets (ACK) one second later. This might mean that the phone becomes slower with time. We have had similar problems with snom phones used together with 3CX, and we can offer you a fix version for testing. " We tried a new version of the firmware (8.4.24) but the problem is still present. Has anyone experienced a similar issue with Snom phones ? I just configured an old Granstream GXP2000 for testing purposes. I will see in a few days if the same problem appears on this phone.