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There has been a significant internationa1 effort to develop standards for Integrated Services Digital Networks (ISDNs) at the same time that events leading to the divestiture of the American Telephone and Telegraph (AT&T) Company were occurring in t...

The millimeter-wave behavior of rain attenuation based on recent experimental data, Jan. 1986

The Institute for Telecommunication Sciences (ITS) is the research and engineering laboratory of the National Telecommunications and Information Administration (NTIA) of the U.S. Department of Commerce (DOC). ITS provides technical support to NTIA in...

The results of a detailed investigation to isolate the location of sources of intentional interference to the HF broadcasting service are presented. The investigation was conducted using observations of intentional harmful interference observed at n...

This report discusses quality–of–service (QOS) issues for telephone networks. Deregulation and divestiture have fostered increased competition in the United States in the telephone equipment and service industries. There are many economic, policy, an...

This report provides an analysis of marketplace developments and procompetitive U.S. policies for the past 15 years, and undertakes a net assessment of the benefits and costs of competition in 14 separate telecommunications and related lines of comme...

The factors that affect the design of a numbering plan for the Integrated Services Digital Network (ISDN) involved a complex interplay between existing plans, national priorities, and technical system limitations. These factors are the subject of thi...

Measurements reported are part of a study of propagation characteristics for millimeter-wave communication links operating in an urban-suburban environment. Absorption data were collected for signals propagated through some common building materials...

This report addresses the concepts, the justification, and the eventual configuration of military access areas. Many factors enter into this access area characterization effort. The key factors emphasized here are: the current telecommunications envi...

The OSI Network Layer Addressing Scheme, Its Implications, and Considerations for Implementation, Nov. 1985

This report identifies the present and projected business utilization of international telecommunications. It focuses on large business users and identifies their service requirements, problems, and viewpoints.

A practical atmospheric Millimeter-Wave Propagation Model (MPM) is formulated that predicts attenuation. delay, and noise properties of moist air for frequencies up to 1000 GHz. Input variables are height distributions (0–30 km) of pressure, temperat...

This report is a study of Travelers' Information Stations (TIS) operating in the 525–535 and 1605–1615 kHz bands. It was prompted by the expansion of the AM broadcasting band from 1605 to 1705 kHz. Included is information on rules and regulations, a...

A Phase I spectrum resource assessment based upon use of the bands containing fixed and mobile services in the 947–17,700 MHz portion of the radio frequency spectrum was completed in 1984. From the total number of fixed and mobile bands, four bands ...

Increases in user demand for, and the availability of, new electronic products that don’t require an individual operating license or frequency assignment have resulted in diverse use of the radio frequency spectrum in disparate operating environment...

Several methods for estimating the potential interference from systems in the Fixed Service to Power-Line–Carrier (PLC) circuits were developed. The Numerical Electromagnetic Code (NEC) computer program, originally developed by the Navy, was used to ...

An analysis of issues in domestic telecommunications with recommendations for national policy. The report focuses on seven major areas: (1) development of technology; (2) structural and other constraints on the telecommunications industry; (3) prospe...

The combined communications probabilities (Cm) have been calculated for 56 Simulated Ship Positions (SSP's) in the North Atlantic to a network of 26 digital selective calling shore stations The Cm are based on individual circuit reliability data obta...

In a cooperative program, the Federal Communications Commission and the Institute for Telecommunication Sciences have begun a study of the interference fields that may arise in a ducting environment. This report gives some preliminary thoughts on how...