Hello everybody,
The problem came from inability to silence modem when it dials out in outbound calls. Even placing in system's modem property ATM0 didn't help. Because IVM probably reset these settings.
1. Setting 'Speaker Volume' to OFF in modem's property didn't help.
2. Placing M0 or ATM0 in 'Extra Initialization Commands' in modem's property didn't help.
I have no idea what else can be done to shut that dialing noise down.
Please advise.
Thanks a lot.