When I answer my phone, there is a 2 to 3 second lag before the incoming caller hears my voice. It is also noticed in the voicemail greating, it cuts off the first 2-3 seconds of the recording. Also, there is a lag or delay from when 3CX picks up the call to when the DA recording begins. I am running a Grandstream 4104 with 4 pstn lines and SNOM 300 phones. Please help. Thanks.