- Intuitive user interface for rapid verification of voice quality of VoIP services
- Configurable pass/fail thresholds for simplified testing
- Supports a wide range of signaling protocols including SIP, SCCP, H.248/Megaco and H.323 to suit most applications
- Includes a full range of RTP metrics to support troubleshooting
- Supports MOS and R-factor quality metrics
- Test configurations can be preconfigured and saved for quick repeatable testing
- Detailed reports are available to help track and maintain a record of changes in the service
- Available for FTB-1 and FTB-200 based applications
- Common tool kit and test interface across all platforms
RTP Network Test
The VoIP RTP Network test is the base test of the EXpert VoIP Test Tools application. This peer-to-peer test measures VoIP-related parameters by streaming RTP packets between two endpoints. All supported functionality for this test conforms to RFC 1889.
The RTP Network test simulates VoIP traffic by streaming RTP packets between a controller test set, which initiates the packet stream, and a responder endpoint that initiates its own stream to the controller test set.
EXpert VoIP has been designed to support a wide variety of VoIP environments to ensure the maximum utility of the tools. As such the application can be configured to use some of the most frequently used VoIP call signaling protocols including SIP, SCCP, H.248/Megaco and H.323.
Voice Quality Metrics
The EXpert VoIP Test Tools base application includes a full set of voice quality metrics including MOS, R-factor and degradation factors based on codec, latency and packet loss to help pinpoint the source of any voice quality issues. EXFO’s voice quality measurement agent calculates R-factor (another standardized transmission quality rating) for a call based on the G.107 E-model extensions. These model extension factors such as packet loss burst to more accurately predict the subjective score a listener would assign that call. The R-factor is then converted to an EXFO MOS score. The EXpert VoIP tests report the raw R-factor and EXFO’s MOS voice quality results for conversational call quality.
The EXFO MOS algorithm used in the application is based on the ITU-T P.800 recommendation, which provides an objective measurement to subjective testing. EXFO has invested significant resources into developing and refining the EXFO MOS algorithm and it has been successfully benchmarked against leading commercially available algorithms.