The nynex overlay network for unique services
Kerry Morgan · International Symposium on Switching · 2005
New York Telephone Company pioneered the introduction of many innovative services in the New York City metropolitan area. Because of their unique character, the then existing switching network was unable to effectively carry the offered traffic. Consequently, several one-of-a kind serving arrangements were established. As demand for these services grow and other areas began to tariff similar offerings, New York Telephone investigated possible methods to enhance the basic services offered as well as to determine a more efficient serving arrangement to replace the disparate networks then in use. With the advent of digital switching under the direction of large stored program controllers and the widespread provision of fiber optic based digital transmission, network capabilities and efficiencies changed drastically. Merging this new technology with New York Telephone's extensive experience with these services has enabled this operating company to engineer and install an overlay network which cost-effectively provides all the features required by the market, as well as protecting the basic telephone network from potential overloads arising from the highly peaked demand characteristic of some of these services. This paper will examine the types of services in question, their early serving arrangements, the parameters considered in designing the new network, and how the interplay of these factors resulted in New York Telephone's decision to deploy a state-of the-art dedicated digital overlay network.