please, please.... did you experiment simmilar problems????
IVM answer to different calls at the same time by merging outgoing messages!
- only voip connections
- more sip accounts with different sip numubers with the same operator
- one LAN Network adapter
- ADSL
- XP pro and 2000 server - no differences
Any one call ask for different OGM tree.
During the replay, the answer given become mixed and you can ear, in the first call, the OGM responses given for the second and viceversa. 
Any one experimented similar problems?
thanks for your replay!