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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 White Papers (View All Report Types)
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Fast IT: Accelerating Innovation in the IoE Era
sponsored by Cisco Systems, Inc.
WHITE PAPER: Cisco offers you the tools to supercharge your IT department to give you a competitive edge. Integrated infrastructure, intercloud strategy, and application programmability are just three of the solutions towards a Fast IT department. Read on to learn how Cisco enables you to dominate the IoE economy.
Posted: 03 Nov 2014 | Published: 01 Jan 2014

Cisco Systems, Inc.

Fast IT: Sourcing Disruptive Innovation
sponsored by Cisco Systems, Inc.
WHITE PAPER: Cisco recently announced new Unified Computing System innovations to address the need for business agility and orchestration. You can simplify your data centre with an integrated infrastructure that enables you to reallocate your IT budget towards innovative technologies to meet changing business goals.
Posted: 04 Nov 2014 | Published: 04 Sep 2014

Cisco Systems, Inc.

Five Ways to a More Competitive Enterprise
sponsored by XO Communications
WHITE PAPER: This white paper presents a communications system designed to be easily manageable, affordable and efficient.
Posted: 02 Mar 2015 | Published: 02 Mar 2015

XO Communications

Flying High on the Use of Red Hat Enterprise Linux
sponsored by Red Hat
WHITE PAPER: This white paper explains how UK-based organization Flybe, Europe's largest regional airline, was able to leverage Linux to revolutionize their IT support capabilities, creating new opportunities for innovation and revenue streams.
Posted: 03 Oct 2014 | Published: 30 May 2014

Red Hat

How a Cloud Phone System Benefits Multi-Site Businesses
sponsored by RingCentral
WHITE PAPER: This white paper explains how you can cure your communications headaches with the cloud.
Posted: 25 Mar 2015 | Published: 05 Dec 2014

RingCentral

How Can You Meet Business Demands Quickly, with Agility and Flexibility?
sponsored by Red Hat
WHITE PAPER: This whitepaper explains how Red Hat Enterprise Linux can help you leverage the same advanced environment and open source solutions applied by today's most innovative IT organizations, such as Amazon and Facebook, and transition to an infrastructure that is open and flexible.
Posted: 09 Oct 2014 | Published: 09 Oct 2014

Red Hat

How Data Centre Infrastructure Management Software Improves Planning and Cuts Operational Costs
sponsored by Schneider Electric
WHITE PAPER: Access this white paper to examine a series of examples of how data center infrastructure management (DCIM) software tools can simplify operational processes, cut costs, and speed up information delivery.
Posted: 23 Dec 2014 | Published: 23 Dec 2014

Schneider Electric

How Extensible Platforms Drive Greater Productivity and Efficiencies In Workplace Communications
sponsored by RingCentral
WHITE PAPER: Access this white paper now to learn how cloud PBX can greatly improve your communications strategy.
Posted: 30 Mar 2015 | Published: 30 Mar 2015

RingCentral

How to choose a VoIP provider
sponsored by Flowroute
WHITE PAPER: This white paper presents the 11 things you need to consider when choosing an SIP trunking provider.
Posted: 11 Mar 2015 | Published: 31 Dec 2014

Flowroute

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 Information Workflow Solutions for Manufacturing Brochure
sponsored by Hewlett-Packard Limited
WHITE PAPER: Access the following white paper to learn how manufactures can leverage hidden information to improve the quality and effectiveness of their operations.
Posted: 27 Jan 2015 | Published: 27 Jan 2015

Hewlett-Packard Limited

HP Service Manager and HP uCMDB Plug-in for VMware vRealize Orchestrator
sponsored by Avnet
WHITE PAPER: This resource examines explores a new way to bridge the gap between your VMware-based virtualization layer and IT Service Management by enabling enterprise operational process automation to improve process efficiency and reduce manual labor.
Posted: 24 Feb 2015 | Published: 24 Feb 2015

Avnet

Find the UC Solution that Fits your Budget
sponsored by North Sydney IT and Cisco
WHITE PAPER: This informative paper examines some of the top UC solutions on the market and compares their TCO so you can see which tool will both satisfy your requirements and fit your budget.
Posted: 03 Apr 2014 | Published: 03 Apr 2014

North Sydney IT and Cisco

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.

Get Ready for Unified Communications!
sponsored by Arkadin
WHITE PAPER: This informative guide explores a 5 step plan for smooth, effective implementation of your newly acquired unified communications platform.
Posted: 20 May 2014 | Published: 20 May 2014

Arkadin

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 to overcome roadblocks to legacy software replacement: a guide for IT leaders
sponsored by MSM Software
WHITE PAPER: This whitepaper gathers together the views of IT leaders from a recent survey of IT leaders and identifies the most typical roadblocks encountered when attempting to modernize legacy systems – as well as how they address those challenges.
Posted: 16 Jun 2014 | Published: 16 Jun 2014

MSM Software

How Unified Communications Pays for Itself
sponsored by ShoreTel - OLD
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 - OLD

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
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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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