CONTENTS

 1     General
 2     Maintenance design objectives
        2.1     Status and other information
        2.2     Inputs and outputs
        2.3     Routine testing
        2.4     Trouble localization
        2.5     Fault and alarm detection and actions at interfaces A, B, V₂, V₃ and V₄
        2.6     Fault and alarm signal detection and actions at interface V₁
        2.7     Fault and alarm signal detection and actions at interface Z
        2.8     Fault and alarm signal detection and actions for transmission systems
        2.9     Fault and alarm signal detection and actions for channel associated signalling (2048 and 8448 kbit/s)
       2.10     Fault and alarm signal detection and actions for channel associated channel signalling (1544 kbit/s)
       2.11     Fault and alarm signal detection and actions for common channel signalling
       2.12     Fault and alarm detection and consequent actions – Other functions of the exchange
       2.13     Supervision or testing of interface function
       2.14     Supervision or testing of signalling functions
       2.15     Supervision or testing of exchange connections
       2.16     Supervision or testing of digital link performance
       2.17     Supervision or testing of analogue link performance
 3     Subscriber line maintenance and testing design objectives
        3.1     Analogue subscriber lines
        3.2     Digital subscriber lines
 4     Operations design objectives
        4.1     General
        4.2     Operations features
        4.3     Exchange functions related to the TMN
 5     Network management design objectives
        5.1     General
        5.2     Network management elements
        5.3     Information provided by an exchange for network management purposes
        5.4     Exchange controls for network management
        5.5     Automatic controls for network management
        5.6     Order of application of controls