Showing papers by "AT&T Teleholdings, Inc. published in 1992"
01 Oct 1992
TL;DR: The strengths and weaknesses of phone-based interfaces are focused on, design guidelines are presented, and future directions are discussed.
Abstract: The telephone is the most ubiquitous computer input/output device with over 200 million units in the U.S. Thousands of applications – from airline reservations to zoo schedules – employ audio output and touch-tone input to control the flow and content of information. Because of the limited information capacity of the telephone, designing useful and usable phone-based interfaces presents a strong challenge to the designer. This paper will focus on the strengths and weaknesses of phone-based interfaces, present design guidelines, and discuss future directions.
13 citations
01 Feb 1992
TL;DR: In this article, the authors examined two centralized powering architectures and determined the impact of these parameters on the installed first cost of the power system, and provided a review of the anticipated narrowband FITL power requirements and specifications.
Abstract: Currently, most regional Bell operating companies (RBOCs) favor centralized powering as the predominant method for powering fiber-in-the-loop (FITL) systems. This is because centralized power systems can provide indefinite power backup, as well as consolidation of power equipment and batteries. The capabilities of such a power system are dependent on several parameters including supply cable gauge, load requirements, and equipment location. This paper examines two centralized powering architectures and determines the impact of these parameters on the installed first cost of the power system. The paper also provides a review of the anticipated narrowband FITL power requirements and specifications.© (1992) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
3 citations