Automatic Indicators

Qrystal speeds up troubleshooting through its patented automatic root cause indicators. The system continuously analyses SIP and RTP traffic for known impairment patterns. Indicators mark calls and streams with these known patterns, which makes it extremely easy to find and monitor issues.

Sender jitter is one example for automatically detected media impairments. This type of jitter is not introduced by the network but rather by the RTP sender’s device. The sender is unable to maintain the frequency of the desired packet interval and packets are transmitted constantly too early or too late creating a very distinct pattern. Qrystal’s intelligent in-call analysis discovers this anomaly and allows operations to focus troubleshooting on end devices.

Sender jitter reduces the safety margin of the targeted service quality and can trigger a response from dynamic jitter buffers leading to excessive delay. Recognizing that a particular handset type regularly creates sender jitter gives CSPs the information they need to confront the equipment manufacturer and request a change.

Sender jitter is only one example of an automatic root cause indicator – the pattern-matching algorithms are continuously extended as new patterns are detected.