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Home > Success Center > VoIP & Network Quality Manager (VNQM) > VNQM Documentation > SolarWinds VNQM Getting Started Guide > What is VoIP monitoring?

What is VoIP monitoring?

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VNQM Getting Started Home

Cisco and Avaya call manager devices are scalable call processing solutions for managing IP-based telecommunications networks. These devices provide VoIP networks with the features and functions of traditional telephony.

When monitoring Cisco CallManagers, SolarWinds VNQM uses the SNMP and ICMP monitoring technology and the AXL API of Cisco to persistently track call manager performance. The CDR/CMR data that Cisco CallManager writes to an FTP server, and that SolarWinds VNQM downloads, helps you identify affected calls and patterns of affected calls. CDR/CMR data provides region information per call record in addition to the call source and destination, MOS, latency, packet loss, termination call code, and more.

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When monitoring Avaya Communication and Media Server devices, SolarWinds VNQM intercepts the CDR packets sent by the TCP protocol, as well as the RTCP data sent through UDP, and based on these data, it provides information about the call details and the call quality.

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For VoIP statistics, SolarWinds VNQM uses simulated VoIP traffic, instead of real VoIP traffic. This ensures the continuous collection of performance statistics so you can know the state of your network at any time, regardless of whether the network is actually being used to complete a call.

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