Hi Kent, thanks for your reply. But I don't quite understand completely.
Do you mean that I have to setup two NICs:
* 1 for internal traffic; communication with clients, other lync servers, etc.
* 1 for sip & rtp traffic; communication with audiocodes gateway
In this case, if the second nic is in a seperate vlan for sip & rtp traffic, I'm guessing the lync clients would also need to be able to connect to this vlan to make the direct connection to the audiocodes gateway (for media bypass)?