New applications of wideband technology

Wideband packet technology (WPT) provides bandwidth on demand at the primary rate for combined services such as image, voice, data, and low-speed video. The DS-1 carrier bandwidth provides the medium for efficient combined packetization of voice and data. The unique characteristics of voice, which cannot stand variable delay but can stand bit dropping, complement the characteristics of data, which cannot stand bit dropping, but can stand some variable delay. Extending the ISDN (integrated services digital network) LAPD protocol across the total bandwidth provides information and control over the network in a forward-acting manner which allows noncoordinated restoration and traffic-dependent time-of-day calling without switching. International transport between the North American 1.5 Mb/s and CCITT 2.04 Mb/s primary rates takes advantage of voice compression and FAX G.3 demodulation, which provides 6:1 FAX G.3 compression. A network management system provides graphic descriptions of the traffic, maintenance, and administration of a large, interconnected, self-healing network through the same packet stream used for information transport