I've noticed there is a bit of a delay whilst using the VoIP during calls, is there a way to reduce this, for example by using a different codec? I have a Snom M9 (pair of DECT phones) connected to VM 30mbit/3mbit service.
I installed an update for the M9 and the handsets which seems to have fixed the problem. It did happen all the time, so don't think it was a bandwidth issue.
I'll let you know if its still a problem.