With IPHost Network Monitor you can run WMI Current Outgoing Calls monitoring of various devices in your network.
To create a WMI monitor for Current Outgoing Calls, provide host name (it must be a Windows host) and specify custom WQL query:
Current outgoing calls being serviced by this computer.
The Telephony System
IPHost Network Monitor is an advanced and easy tool for monitoring LAN and WAN networks, network servers, workstations and TCP/IP devices. Use IPHost Network Monitor to monitor your servers, domains, computers and devices.