Now, there's a tool to test VoIP networks from the edge. NetTool Inline VoIP Tester puts the power of inline testing in the hands of frontline technicians, giving you the ability to monitor VoIP service at the edge.

The Boot Log displays key boot events such as DHCP address acquisition, DNS lookup of call servers and gateways, downloading of operating files, and call server registration. NetTool VoIP supports complete troubleshooting of the IP phone boot process including physical layer tests of structured wiring, patch cables, switch port configuration, VLANs and PoE voltage.

The VoIP Log displays call control events, QoS configuration, and call quality metrics. The log records call setup, configuration, and tear down of a call in progress. As the call proceeds, the RTP configuration is displayed including IP addresses and ports used, VLAN priority or Diff Serv and codec. Once the call is competed, the log displays the RTP quality metrics such as jitter and dropped packets.

The VoIP Monitor feature tracks call quality in progress by measuring the RTP stream and displaying the number of frames, dropped frames, out of sequence frames and jitter. The monitor also displays RTCP endpoint information such as jitter and dropped packets. Statistics are available for both the phone side and the network side while a call is in progress.

You can now see into VoIP calls by connecting between the IP phone and network and solve many problems without the need of a protocol analyzer. Diagnose phone boot-up problems, call control and measure key call quality metrics. NetTool Series ll is compatible with IP phones employing either SIP, SCCP or H.323 call control protocols. 

VoIP Option testing configurations

Four testing locations shown below support the complete VoIP life cycle with testing, monitoring and troubleshooting capabilities at the edge of the VoIP network: before phone installation, with the phone installed and NetTool cascaded off the phone.

1. NetTool to switch
2. IP phone to NetTool to switch
3. NetTool to IP phone to switch
4. PC to NetTool to IP phone to switch