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While using VQManager, one of the first things you need to do is deciding how to obtain the call information in the application (VQManager). It can be done in two ways:
Sniffing the packets in the network
Parsing the Call Detail Record (CDR) log files generated by call servers
VQManager sniffs the network packets and filters the VoIP packets viz., SIP, Skinny, H.323, RTP and RTCP and thus monitors the call inventory and QoS information. It also monitors the overall packet flow and computes the ratio of bandwidth utilization of voice to non-voice usage. To get reliable metrics on this front, the VQManager should be able to sniff all the packets flowing in the network. In a typical Switch environment, to get ALL the network traffic into one interface, Port Mirroring has to be enabled and VQManager has to be run in this mirrored port. Refer to the Configuration Wizard section for more details on configuring the specific interface to sniff data from.
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