This standard applies to circuit-switched digital services, and provides and defines the performance parameters and measurements needed by users, vendors, and providers of circuit-switched digital services, to characterize the user-observable performance of these services (i.e., it does not address the causes of errors). It also includes parameters to be considered in determining whether or not a service is in the available or unavailable state. A given service will only reference those parameters or thresholds applicable to that service. The network-specific parameters are for performance allocation and network control.

Standard performance parameter definitions and measurements are provided to ensure an understanding of: measured performance values, performance allocation among network elements, and compatibility of performance measurements among network users, providers, and equipment vendors. This document provides framework information for ATIS-0100517.1995(R2006), Integrated services digital network (ISDN) - Performance parameters and objectives, which contains numerical specifications and allocations for the parameters and measurements discussed in this standard. Formerly known as T1.507-2002(R2006).