Special Services

This talk describes very generically some switched and non-switched special services. The switched special services include INWATS, calling card service, Virtual Private Network (VPN), custom calling features, CENTREX and ISDN. Each of these services are described at a very high level with emphasis on their features and advantages. The non-switched services discussed include Digital Data Service (DDS), and alternate voice data service. The architecture described is generic and very high level.