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ALSO CALLED: Integrated Services Digital Network Hardware, ISDN Modems, ISDN Devices, ISDN Routers
DEFINITION: In Integrated Services Digital Network (ISDN) service, a T interface is the electrical interface between a network terminating unit 1 (NT1) and a network terminating unit 2 (NT2) device, which typically is a private branch exchange (PBE). Like the S interface, the T interface has four wires, allowing up to eight devices to be addressed. In Basic Rate Interface (Basic Rate Interface in ISDN) ISDN,  … 
Definition continues below.
ISDN Hardware Reports
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Global Connectivity Index 2015
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RESEARCH CONTENT: Which countries are the most digitally advanced? Find out in the 2015 Global Connectivity Index, which ranks 50 economies for their use of IT, telecommunications and digital technology.
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Group-Based Policy for OpenStack
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WHITE PAPER: This white paper introduces the new OpenStack Group-Based Policy (GBP) framework designed to offer a new set of API extensions to manage OpenStack infrastructure through declarative policy abstractions. Find out how GBP is based on four main concepts and explore a broad range of use cases.
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VIDEO: Access this informative video to see an in-depth demonstration of how to fix the power supply on a desktop computer in order to get it started working again.
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Hadoop for Cloud ebook
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Hardware Upgrades to Improve Database SharePoint, Exchange, and File Server Performance with the Dell Poweredge T630
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HP CarePack Services Defined
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WHITE PAPER: HP Care Pack Services are support packages that expand and extend standard warranties for HP hardware and software. HP Care Pack Services provide hardware and software support, installation services, education services and premium support options to meet the needs of business-critical IT environments. View this data sheet to learn more.
Posted: 03 Mar 2014 | Published: 31 Dec 2012

Insight and HP
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ISDN HARDWARE DEFINITION (continued): …  the bits that flow from the central office through the NT1 are divided into two 64 Kbps channels (known as B, or bearer, channels) and one 16 Kbps channel (the D, for data or delta, channel) for control signals. The control signals allow a specific device to be addressed. The following table summarizes the various ISDN electrical interfaces at different demarcation points or places in the traffic flow: Electrical interfaceBetween what two pointsU interfaceCentral office and NT1T interfaceNT1 and NT2 devices (such as a PBX)S interfaceNT1 or NT2 and ISDN devices (such as a telephone or terminal … 
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