I currently have 2 MSS's that are networked to a MN and a 3rd party vm system also networked to MN via VPIM. All users can communicate across to eachother. When sending from AVAYA to the 3rd party system, the user on the 3rd party system hears some clipping in the msg. this is not present in the reverse direction. 1 MM cluster is using GSM and the other G711. The remote machines on MN for both of those MSS are set for G610. What is a possible starting point to see where this is happening?