T. Sekine et al., ENHANCING NSP NSSP SOFTWARE FUNCTIONS - SOFTWARE-DEVELOPMENT FOR THE INTELLIGENT NODES USED TO PROVIDE ADVANCED TELEPHONE SERVICES/, NTT review, 7(4), 1995, pp. 93-96
Advanced telephone services like Free Dial (Free Phone; 800 service in
the United States) are finding growing use by customers. Here we intr
oduce the NSP, NSSP and control terminal that support the pro vision o
f advanced services, tracing their development to date and describing
recent enhancements made to their software functions.