Data and Voice Network Infrastructure

• Introduction
• VoIP as a Driver of Converged Networks
• Network Architectural Model
• Structured Cabling Systems
• Network Management Considerations
• Summary

Introduction

Networking technologies serve as the telecommunications backbone of most universities and colleges, and have a critical role in their operations. The design, installation, and operation of network systems was initially treated as an administrative overhead function and was not typically considered a priority function.

The following factors have caused an evolution in how network technologies are used and how academia relies on them:

• Distribution of data. Most end-user workstations do not have a local copy of all necessary data required by the end user. Institutions commonly use a network operating system to mount “virtual disks.” Although this solves many problems, such as the ability to archive data, an network outage removes the ability of the user to access this data, and poor network performance, such as congestion and latency, will adversely affect users.
• Distribution of applications. End users rely heavily on e-mail, and business systems are typically architected using a client-server model, or more recently, a web-based model. All such applications require a functional network.
• Convergence of data, voice, and video services. Many universities and colleges have deployed VoIP (Voice over Internet Protocol) systems to replace legacy telephony systems, and the use of video technologies is growing.
• Integration of “stovepipe” networks. Most core infrastructure systems that previously operated on a private “stovepipe” network are being migrated onto the converged networks. These systems include building automation, access control, intrusion, and fire alarms.
• Reliance on Internet connectivity. In addition to the factors detailed, organizations increasingly rely on the Internet. Reliable and robust communications must now exist both internal and external to the organization.