"The original T1.232-1996 provided information on a wide range of topics germane to the design of Human Machine Interfaces (HMIs). Subsequent work in the Telemanagement Forum and the ITU-T went into more detail in several important and specific areas. This work resulted in the three ITU-T standards referenced in this document (see clause 3). These three ITU-T Recommendations should be employed directly for HMI design in telecommunication management applications. In order to maintain the valuable information contained in ANSI T1.232-1996 (R2001) and connect it to the ITU-T standards@ this pointer document was created with the original text in an informational annex. Application Telecommunications networks operators manage their infrastructure and services via HMIs to operating systems (OSs) and management applications. In the ITU M.3000 series Recommendations@ this user interface is identified as the ""G"" interface. The HMI is one of two classes of interface: Machine-to- Machine and Human-to-Machine. As telecommunications network technology becomes increasingly diverse@ management issues have become more complex. This complexity requires improved and standardized network management HMIs to increase the quality of service and reduce response times to customers."