PDF of this tutorialOverview
Throughout the century-long evolution of modern telephony services, increasingly powerful signaling methods have provided a key part of the foundation for maintaining system-wide interdevice communications and robust call-control functions as well as providing the extensibility needed for provisioning new advanced services. As signaling methods have progressed from early voltage/current-based schemes, through dual tone multifrequency (DTMF) to today’s digital technologies, overall telephony capabilities have also expanded to include additional features, such as touchtone-activated services, caller I.D., phone number portability, integrated services digital network (ISDN), and computer telephony integration (CTI). Similarly, the evolution toward intelligent, message-based, digital signaling has also allowed for more efficient call setup, improved quality, more effective system management, and expanded scalability of telephony networks. This tutorial will cover message-based signaling in voice-over-broadband networks.
