NEC 128 manual Introduction, Overview

Page 5

1-1

Introduction

Overview

In today’s fast paced business climate, timely access to accurate information is a critical resource in every successful organization. Often, this information must be communicated face-to-face. However, with busy schedules and remote locations, getting everyone together for a conference can be difficult and expensive. NEC’s VisuaLink products can bring everyone together with an easy and cost affordable solution.

VisuaLink sets new standards in group videoconferencing delivering high-end features for about one-fifth the price of other systems. VisuaLink makes videoconferencing practical, easy, and cost effective. Now, moving information between individuals or groups located in- house or in remote locations is no longer a problem. VisuaLink provides a dynamic solution to deliver video/audio information at the speed of light.

VisuaLink 128 and VisuaLink 384 are lightweight, fully integrated videoconferencing Codecs that become the heart of a videoconference system. VisuaLink 128 supports a single 128 Kbps BRI connection (upgradable to 384 Kbps). The VisuaLink 384 supports 384 Kbps, using three BRI connections.

These all-in-one units use advanced plug-and-play technology to get up and running in seconds. They connect to most televisions or monitors and can be used with a wide variety of cameras, microphones and other audio/video systems.

NEC videoconferencing solutions are powerful productivity tools that provide organizations the ability to address issues and respond to opportunities more quickly. More people can be effectively involved to facilitate a more open and collaborative working environment. NEC is the only vendor who provides products for the full range of videoconferencing-- from rollabout systems and broadcasting equipment to the newest compact videoconference systems.

VisuaLink 128/384 General Description

Image 5
Contents VisuaLink 128/384 NDA-24229, IssueLiability Disclaimer Contents Specifications Overview IntroductionFeatures Phone-Like Dialing Echo CancellerCamera Control Videoconferencing CompliancePBX Connectivity Field UpgradableApplications Isdn BRI VisuaLink Documentation Introduction VisuaLink 128/384 General Description Roll-About Desktop PC Gateway Application ConfigurationsEasily moved, use in active locations Roll-AboutVideo Cabinet Roll-About ComponentsVisuaLink 128/384 Video MonitorMicrophone Motion Video CameraCable Kit OptionsAlso available with control software Desktop PCCCD Desktop Camera Desktop PC ComponentsVideo Capture Board NT1 Graphics Camera D30 Camera AT841/INT Microphone VisuaLink Director SoftwareLaptop PC option Personal Computer RequirementsVisuaLink & ViewPoint VBX Gateway GatewayVisuaLink Direct Connect Gateway System Control Technical DescriptionVideo & Audio Interfaces Echo CancellerCodec VideoLine Interface System ControlVideo Frame Rate Picture ResolutionMore on H.320 Videoconferencing Audio Video ProcessingData Transmission Rate For ExampleTechnical Description VisuaLink 128/384 General Description Installation Requirements Installation & MaintenanceMaintenance Requirements General Specifications SpecificationsPage General Parameters Parameter VisuaLinkUnit Size Line Interface External Interface ParametersSerial VisuaLink Unit Control Operating Modes & FeaturesCall Dialing Originating Modes Incoming Call Answer ModesLine Connect Modes Line Interface ControlVideo Display/Output Modes Audio Control ModesMulti-Point Conference Control MaintenanceSerial Port Modes VisuaLink 128/384 General Description

128 specifications

The NEC 128 is a remarkable microprocessor that represents a significant leap in technological innovation during its time. Introduced in the early 1980s, this processor was designed to meet the demands of increasingly sophisticated computing tasks, primarily aimed at the burgeoning field of personal computing and embedded systems.

One of the standout features of the NEC 128 is its 16-bit architecture, which was quite advanced for its era. This architecture allows for a greater data throughput, enabling the handling of larger data sets and providing improved performance over its predecessors. The NEC 128 operates on a clock speed that typically ranges from 4 to 8 MHz, making it capable of executing instructions efficiently and swiftly, which was crucial for running more complex applications.

The processor is built using CMOS technology, which offers significant advantages in terms of power consumption compared to earlier bipolar technology. This characteristic made the NEC 128 not only suitable for desktop computing but also an appealing choice for battery-operated devices, enhancing its versatility. The use of CMOS allowed for a reduced heat output, contributing to the reliability and longevity of devices powered by this microprocessor.

Another noteworthy aspect of the NEC 128 is its support for a variety of addressing modes. This flexibility enables programmers to write more efficient and compact code, optimizing the use of memory resources. By supporting both immediate and indirect addressing, the NEC 128 allows for more dynamic programming, which is essential for developing applications that require real-time processing.

The processor's architecture also includes a robust instruction set that facilitates arithmetic operations, logical operations, and control flow management. This comprehensive instruction set is instrumental for developers, as it provides the necessary tools for creating a wide range of applications, from simple utilities to more complex software systems.

In summary, the NEC 128 microprocessor is characterized by its 16-bit architecture, efficient CMOS technology, and a versatile instruction set, making it a compelling choice for its era. Its combination of performance, power efficiency, and flexibility positioned it as a formidable player in the personal computing market and laid the groundwork for future advancements in microprocessor technology. With its various applications and features, the NEC 128 remains a noteworthy chapter in the history of computing.