ATIS T1.TR.18-1993

The voice services In-Service, Non Intrusive Measurement Device (INMD) measures active speech level, noise level, speech echo path loss and speech echo path delay at four wire points in the network. As such, it can be used to recognize network anomalies if performance and maintenance limits on these parameters can be established. It is recognized that unique transmission limits do not exist since the performance objectives vary with network providers. This report provides a methodology for establishing INMD performance and maintenance limits based on the network provider's particular objectives. Because this methodology is generic, it can also be used for future INMD that measure other service parameters such as analog or digital data, ISDN, packet, etc. performance parameters.