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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 SystemsWhite Papers (View All Report Types)
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Essential Strategies for Ensuring IT Data Analysis
sponsored by VMware, Inc.
WHITE PAPER: This white paper discusses various types of IT data and are examined for how close (or far) they are from being "normally" distributed.
Posted: 21 Aug 2012 | Published: 30 Dec 2011

VMware, Inc.

How Technology Is Transforming Finance
sponsored by Oracle Corporation UK Ltd
WHITE PAPER: This resource collects articles from CIO and The Economist Intelligence Unit regarding how technology is transforming finance and the growing partnership between finance and IT.
Posted: 11 Apr 2014 | Published: 11 Apr 2014

Oracle Corporation UK Ltd

How to tie learning to business impact
sponsored by ComputerWeekly.com
WHITE PAPER: Many organisations implement “learning engagements,” or training programmes, to increase employee satisfaction, realise better team performance, and improve communication.
Posted: 21 Oct 2011 | Published: 09 Dec 2010

ComputerWeekly.com

HP's New Style of IT - Delivering a New Approach to IT Service Management
sponsored by Hewlett-Packard Company
WHITE PAPER: This graphic white paper covers an IT management solution that you can mold to your business requirements and budget.
Posted: 26 Nov 2013 | Published: 26 Nov 2013

Hewlett-Packard Company

IBM: Redefining Enterprise Systems
sponsored by IBM
WHITE PAPER: Access this white paper to find out why it is imperative for enterprise IT infrastructures to adapt to modern challenges by utilizing cloud computing and taking new approaches to analytics and security.
Posted: 06 Dec 2012 | Published: 07 May 2013

IBM

Evaluating the Total Costs of a Unified Communications Solution
sponsored by Cisco
WHITE PAPER: Discover the top recommendations for selecting a UC solution that fits the needs of your business. Learn how to weigh the most important factors and assess the TCO of your UC solution.
Posted: 17 Jul 2013 | Published: 17 Jul 2013

Cisco

Extend the Value of IBM Lotus Applications to Increase Productivity with Avaya Unified Communications - Sponsored by Avaya and IBM
sponsored by Avaya
WHITE PAPER: Good communications are key to any company's success. The most successful enterprises strive for anywhere, anytime communications to best serve employees and clients who are increasingly mobile and geographically diverse. By unifying communications, a company can deliver communications anywhere, anytime and any way.
Posted: 25 Jun 2009 | Published: 25 Jun 2009

Avaya

Extending Enterprise Networks with Service Delivery Environments
sponsored by Alcatel-Lucent
WHITE PAPER: This vendor white paper - prepared by Alcatel-Lucent - discuses how service providers need to continuously expand their service offerings to address increasing competitive demands, create new ways to drive business and increase market share.
Posted: 10 Sep 2007 | Published: 01 Sep 2007

Alcatel-Lucent

Five Best Practices For Unified Communications
sponsored by AT&T Corp
WHITE PAPER: To meet today’s increasing demands, businesses need to communicate and collaborate more efficiently. Communication needs to be timely and effective, reaching people where and when they want to be reached, at the office, at home or on the go.  Read this white paper to learn the five best practices for unified communications.
Posted: 13 Oct 2010 | Published: 13 Oct 2010

AT&T Corp

From Fear to Value: CIO strategies for propelling business through the economic crisis
sponsored by IBM
WHITE PAPER: Your aspiration: As a CIO, drive change, innovation and efficiency to help build a smarter enterprise that will prosper amidst global competition. Your daily challenge: As a CIO, deliver business results faster and better–with less. This whitepaper outlines key strategies for CIOs to drive business results through the economic crisis.
Posted: 18 Jun 2010 | Published: 17 Mar 2009

IBM

Frost & Sullivan – 2013 Global VC Technology Leadership Award
sponsored by Vidyo, Inc.
WHITE PAPER: This Frost & Sullivan research paper details why Vidyo was awarded their Technology Leadership award in the videoconferencing market and how the solution meets today's top VC benchmarks.
Posted: 02 May 2013 | Published: 31 Dec 2012

Vidyo, Inc.

Gaining Cloud Fax Advantages with SAP Systems
sponsored by Esker Inc.
WHITE PAPER: Adoption of cloud services for fax communnication has steadily increased as organizations seek to reduce costs, simplify their IT landscapes and streamline processes. Companies looking to integrate fax with their SAP applications no longer have to choose between efficiency, cost and functionality.
Posted: 21 Dec 2010 | Published: 21 Dec 2010

Esker Inc.

Getting Mobile Collaboration Right
sponsored by Avaya
WHITE PAPER: This valuable guide offers information and advice to help you prepare and build an intelligent mobile collaboration strategy.
Posted: 19 Jun 2013 | Published: 19 Jun 2013

Avaya

Global Trends Drive Business Strategies
sponsored by Alcatel-Lucent
WHITE PAPER: Today’s business models do not create the commensurate revenue to fund the investment to deliver against growing traffic volumes. This is particularly salient in North America as CSPs provide more services and bandwidth on flat rate ‘all-you-can-eat’ price models. Read this paper to learn so much more.
Posted: 19 Aug 2010 | Published: 16 Aug 2010

Alcatel-Lucent

How Customers Are Cutting Costs and Building Value with Microsoft Virtualization
sponsored by Microsoft
WHITE PAPER: Virtualization provides powerful, tangible ways to streamline many traditionally time-consuming processes and minimize the resources needed to deploy and manage IT resources. This white paper examines how Microsoft® customers are using virtualization technology to simplify their IT infrastructure, IT processes, and save money.
Posted: 19 Mar 2009 | Published: 03 Nov 2008

Microsoft

How Unified Communications Pays for Itself
sponsored by ShoreTel
WHITE PAPER: In this whitepaper, uncover best practice tips for building a comprehensive business case for unified communications (UC), as well as details about the benefits you will reap and alternate approaches to UC implementation you can implement.
Posted: 06 Jun 2012 | Published: 30 Nov 2010

ShoreTel

HP OpenCall Media Platform: A Cost-effective, Agile IP Media Server
sponsored by Hewlett-Packard Company
WHITE PAPER: Mobile communication technologies are evolving quickly and new customer demands arise almost every day. At the same time, the economic downturn has impacted budgets, so that cost efficiency now tops the corporate agenda. Service providers must now must not only test and develop new services to meet customer demand, but do it within tight budgets.
Posted: 16 Sep 2009 | Published: 01 Sep 2009

Hewlett-Packard Company

HP white paper: Complete Data Protection for VMware Virtual Environments
sponsored by Hewlett-Packard Company
WHITE PAPER: This paper examines the issues of backup and recovery in VMware virtual server environments, and outlines the key features of HP Data Protector.
Posted: 26 Jun 2009 | Published: 01 Nov 2008

Hewlett-Packard Company

HP's Universal CMDB: A Balanced Approach to Unifying IT Operations, Service Desks, and Business Objectives
sponsored by Hewlett-Packard Company
WHITE PAPER: In this white paper, read about the evolution of Configuration Management Database (CMDB) adoption in the market, CMDB solution integration and the overall architecture requirements for CMDB.
Posted: 24 Aug 2007 | Published: 01 Jan 2007

Hewlett-Packard Company

IBM Cognos Lifecycle Manager - Streamline upgrades with automated testing
sponsored by IBM
WHITE PAPER: System upgrades and other IT changes can have a negative impact on business intelligence report content, but testing thousands of reports can be tedious and time-consuming. This resource introduces a utility that relieves the burden by automating the testing process.
Posted: 15 Jan 2014 | Published: 31 Oct 2012

IBM

IBM Cognos Lifecycle Manager - Streamline upgrades. Meet changing business and IT requirements quickly.
sponsored by IBM
WHITE PAPER: The process of verifying that business intelligence report content has not been adversely affected following a change in the IT environment can be time-consuming and tedious. This resource introduces a utility that automates the testing process – read on to learn more.
Posted: 15 Jan 2014 | Published: 30 Sep 2012

IBM

IBM Service Management for the Intelligent Utility Network
sponsored by IBM
WHITE PAPER: The current utilities environment requires companies to decrease costs while increasing the ability to control utility assets. One key challenge is how to take advantage of new technologies to better manage the delivery of service to customers today and into the future. IBM Service Management for the IUN provides a blueprint for getting started.
Posted: 06 Dec 2010 | Published: 06 Dec 2010

IBM

IBM Tivoli Service Request Manager White Paper
sponsored by IBM
WHITE PAPER: This IBM white paper will show you how you can help your organization manage incidents and problems, restore critical services, and minimize service desk calls in this white paper.
Posted: 22 Oct 2010 | Published: 15 Jan 2010

IBM

IBM WebSphere Distributed Caching Products
sponsored by IBM
WHITE PAPER: In today's tech environment, your enterprise systems are seeing higher levels of traffic and more usage spikes due to the proliferation of mobile devices. In this white paper, learn how you can scale your business-critical applications and systems, while maintaining high performance to keep customers satisfied.
Posted: 17 May 2013 | Published: 30 Jun 2012

IBM

IDC Buyer Case Study: Customer-Centric, User-Friendly Videoconferencing
sponsored by Vidyo, Inc.
WHITE PAPER: This IDC Buyer Case Study explores which videoconferencing solution Mydin, Malaysia's largest retailer enterprise, put in place to help connect and communicate, reduce costs, and achieve an optimal ROI.
Posted: 07 May 2013 | Published: 31 Jul 2012

Vidyo, Inc.
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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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