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T-Carrier Systems

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ALSO CALLED: Digital Signal Level 1, DS0, Digital Signal Level Hierarchy, DS1, Digital Signal Level 4, DS3, DS2, DS4, DS Level Hierarchy, Digital Signal Level 3, Digital Signal Level 2, Digital Signal Level 0
DEFINITION: To see the relationship between T-carrier, E-carrier, and DS0 multiples, see digital signal X. The T-carrier system, introduced by the Bell System in the U.S. in the 1960s, was the first successful system that supported digitized voice transmission. The original transmission rate (1.544 Mbps) in the T1 line is in common use today in Internet service provider (ISP) connections to the Internet. Another  … 
Definition continues below.
T-Carrier Systems Reports
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10 Dying IT Skills
sponsored by Global Knowledge
WHITE PAPER: When an IT skill falls out of favor, it rarely ever comes back. Here's our list of 10 dying IT skills. If any of these skills are your main expertise, perhaps it's time to think about updating your skill set.
Posted: 13 May 2009 | Published: 13 May 2009


Achieving Cost and Resource Savings with Unified Communications
sponsored by Microsoft Corporation India Pvt Ltd
WHITE PAPER: Enterprises are always seeking to cut costs and optimize resource utilization. Now, in this harsh economic climate, the need is more compelling than ever. This paper highlights potential savings exceeding $5,000,000 per year for each 1,000 employees through the application of Microsoft Unified Communications to your business and IT operations.
Posted: 20 Nov 2009 | Published: 20 Nov 2009


Achieving Rapid Data Recovery for IBM AIX Environments: An Executive Overview of EchoStream for AIX
sponsored by Vision Solutions
PODCAST: This podcast looks closely at a unique data recovery solution for IBM AIX Environments called EchoStream for AIX.
Posted: 09 May 2008 | Premiered: 09 May 2008


ActiveRoles Server: Active Directory Management - Free Trial!
sponsored by ScriptLogic Corporation
TRIAL SOFTWARE: Businesses today grow and change at a frantic pace, making Active Directory (AD) management one of the most time-consuming IT tasks. AD administrators struggle to keep up with requests to create, change or remove user access to various network resources.
Posted: 15 Apr 2009 | Published: 15 Apr 2009


Alcatel-Lucent Ultimate Wireless Broadband Solution
sponsored by Alcatel-Lucent
PRODUCT OVERVIEW: Read about Alcatel-Lucent's Ultimate Wireless Broadband End-to-End LTE solution. This industry leading solution enables you to successfully evolve your business model and realize the revenues, reduced costs, and increased efficiency delivered by Long-Term Evolution. Learn how it can help you take full advantage of wireless IP service delivery.
Posted: 11 Jun 2009 | Published: 11 Jun 2009


An Emerging Triple Play: Video Communications, Managed Services and Unified Communications
sponsored by TANDBERG
WHITE PAPER: An intriguing triple-play is emerging - the combination of video communications, managed services and unified communications - to create a new approach to inter- and intra-company collaboration and operational excellence.
Posted: 12 Nov 2009 | Published: 12 Nov 2009


As The Market Turns Around A Hot New Communications Service Market Emerges
sponsored by Hewlett-Packard Company
WHITE PAPER: Communications as a service (CaaS) is a hot new market that promises to grow quickly. In CaaS, communications technology is located in a data center of a communications service provider, and is owned and managed by the service provider as a multi-tenant infrastructure. Read the white paper for more information on Communications as a service.
Posted: 08 Feb 2010 | Published: 08 Feb 2010


Blackberry Enterprise Server v4.1 Service Pack 6
sponsored by BlackBerry
WEBCAST: The BlackBerry Enterprise Solution provides push-based access to email; calendar, contacts, tasks and notes; instant messaging; web-based applications and services and enterprise applications.
Posted: 25 Aug 2008 | Premiered: 25 Aug 2008


BMC Mainview: Controlling Mainframe Operating Costs While Maintaining Service Levels
sponsored by BMC Software, Inc.
WHITE PAPER: Directors of IT operations are under pressure to control or reduce mainframe operating costs while maintaining service levels to the business. This paper describes how BMC® MAINVIEW® from BMC Software uniquely delivers aggressive and strategic performance management and optimization.
Posted: 17 Apr 2009 | Published: 17 Apr 2009


Boom in Mobile Data Creates Backhaul Urgency
sponsored by Alcatel-Lucent
WHITE PAPER: This paper will identify the challenges mobile operators face in the current environment; outline the steps they can take to evolve the backhaul network to support greater capacity at lower cost; and examine the role of a trusted partner in helping implement a mobile backhaul solution that meets their specific business imperatives.
Posted: 26 Mar 2009 | Published: 26 Mar 2009


Case Study: Unified Communications and Indiana University Medical Group
sponsored by CDW Corporation
CASE STUDY: When outdated equipment and disparate systems were hampering in-house communications, customer service, and workflow, Indiana University Medical Group turned to CDW for a three-part Cisco solution. This case study gives details on the benefits they gained.
Posted: 08 Sep 2009 | Published: 08 Sep 2009


CDW Services: Unified Communications
sponsored by CDW Corporation
WHITE PAPER: Read this paper to learn what CDW Corporation has to offer your organization in terms of unified communication solutions.
Posted: 08 Feb 2010 | Published: 08 Feb 2010


Cisco Unified Communications Manager 7 Dial Plan Enhancements and Their Effect on the Dial Plan
sponsored by Global Knowledge
WHITE PAPER: The dial plan is a key element in Cisco Unified Communications Manager (CUCM) environments. The dial plan is at the very core of the user experience. For companies that have multiple locations, or that are global, a comprehensive dial plan can become large and very complex.
Posted: 06 Nov 2009 | Published: 06 Nov 2009


Clearing the Way for Faster, Smarter Decisions: Instant, Accurate Information Drives Competitive Edge
sponsored by SAP America Inc
WHITE PAPER: This paper examines how you can gain reliable, accessible information from efficient, integrated IT systems – and use that information to make faster, smarter decisions. In turn, the right decisions will lead to better operations and a stronger competitive position.
Posted: 26 Oct 2009 | Published: 26 Oct 2009


Controlling Costs and Driving Agility in the Datacenter: Optimizing Server Infrastructure with Microsoft System Center
sponsored by Microsoft Corporation India Pvt Ltd
WHITE PAPER: To help control costs, improve business agility, and remain secure and in compliance, many IT organizations are taking steps to transition to a truly dynamic infrastructure. Microsoft® System Center is a family of leading IT management solutions that helps IT departments proactively plan, deploy, manage, and optimize an IT environment.
Posted: 23 Nov 2009 | Published: 23 Nov 2009


Demo: Personalized content and Advertising
sponsored by Alcatel-Lucent
VIDEO: Charles Bahr of Alcatel-Lucent Multimedia Solutions Marketing and Christophe Senot of Bell Labs demonstrate the technologies that can be combined to create a personalized content and advertising experience across any screen.
Posted: 20 Nov 2009 | Premiered: 20 Nov 2009


E-Guide - Service Delivery Platforms: Building the Next-Gen Network Architecture
sponsored by Alcatel-Lucent
EGUIDE: Next generation services need to meet customer and carrier needs; network convergence is the technical goal, while IP transformation is the business goal. This guide addresses the challenge of planning for providers doing both at the same time and lays out a service delivery platform (SDP) and SOA roadmap to recreate the network architecture.
Posted: 02 Sep 2009 | Published: 02 Sep 2009


Eco-sustainable Wireless Networks: Ready for Prime Time
sponsored by Alcatel-Lucent
WHITE PAPER: Developments in alternative energy technology are creating solutions that provide network operators with the ability to reduce their energy costs and carbon footprint. Read this short whitepaper for more information about alternative energy sources that can make your wireless network more eco-friendly and save you money.
Posted: 02 Oct 2009 | Published: 02 Oct 2009


Eco-sustainable wireless service: Opening new markets through cost-effective, alternative energy wireless base stations
sponsored by Alcatel-Lucent
WHITE PAPER: About a billion people worldwide do not have access to telecommunications services, mostly from lack of a power grid that can support network infrastructure. Traditional wireless networks for remote locations rely on costly generators that are hard on the environment. Read this whitepaper to learn about cost effective and eco-friendly alternatives.
Posted: 29 Oct 2009 | Published: 29 Oct 2009


eGuide: Defining a cost-effective mobile IT strategy
sponsored by Dell, Inc. and Intel
EGUIDE: In this series, Craig Mathias explores the various ways mobility solutions can be used successfully and cost-effectively in your enterprise.
Posted: 02 Sep 2009 | Published: 02 Sep 2009


Electrical Efficiency Measurement for Data Centers
sponsored by APC by Schneider Electric
WHITE PAPER: This paper explains how data center efficiency can be measured, evaluated, and modeled, including a comparison of the benefits of periodic assessment vs. continuous monitoring.
Posted: 29 Apr 2009 | Published: 29 Apr 2009


Embedding Architecture into the Organization
sponsored by Infosys Technologies Limited
WHITE PAPER: Our experience suggests that Enterprise Architecture (EA) governance determines the impact of the architecture team to a great degree. We describe and manage EA governance along six dimensions.
Posted: 04 Nov 2009 | Published: 04 Nov 2009


EtherScope Analyzer
sponsored by Fluke Networks
PRODUCT DEMO: First responders to network emergencies rely on the EtherScope Series II Network Assistant when it's time for action -- a handheld network analyzer combining essential tools that help network professionals quickly solve the wide range of problems they encounter. Take advantage of our free 5-day trial. Click "View Now" to request your free trial.
Posted: 27 Jan 2010 | Published: 27 Jan 2010


Event-Driven Intelligence in Telecommunications
sponsored by Pitney Bowes Business Insight
WHITE PAPER: Leading telecommunications companies are finding ways to integrate data into business processes and also automate decisions with on-demand business analytics. This paper can provide you with background on Intelligent Mail®, with an emphasis on the 21 practical ways you can leverage mailstream intelligence to improve your business today.
Posted: 15 Jan 2010 | Published: 15 Jan 2010


Four Key Ingredients for Successful Mobile Services
sponsored by Hewlett-Packard Company
WHITE PAPER: To compete and succeed in a changing market, mobile service providers need to enhance their voice offerings while delivering innovative new experiences for their customers. Many companies are accomplishing this by consolidating on a single, agile platform that also allows them to launch innovative new services that go beyond voice to video.
Posted: 08 Feb 2010 | Published: 08 Feb 2010

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T-CARRIER SYSTEMS DEFINITION (continued): …  level, the T3 line, providing 44.736 Mbps, is also commonly used by Internet service providers. The T-carrier system is entirely digital, using pulse code modulation (PCM) and time-division multiplexing (TDM). The system uses four wires and provides duplex capability (two wires for receiving and two for sending at the same time). The T1 digital stream consists of 24 64-Kbps channels that are multiplexed. (The standardized 64 Kbps channel is based on the bandwidth required for a voice conversation.) The four wires were originally a pair of twisted pair copper wires, but can now also include … 
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