Network Management Strategies for the CIO
Email Alerts
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phase-shift keying (PSK)
Phase-shift keying (PSK) is a method of digital communication in which the phase of a transmitted signal is varied to convey information. Definition
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Basic Rate Interface (BRI)
In the Integrated Services Digital Network (ISDN), there are two levels of service: the Basic Rate Interface (BRI), intended for the home and small enterprise, and the Primary Rate Interface (PRI), for larger users. Definition
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gigahertz (GHz)
The gigahertz, abbreviated GHz, is a unit of alternating current (AC) or electromagnetic (EM) wave frequency equal to one thousand million hertz (1,000,000,000 Hz). Definition
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egress
Egress (pronounced EE-grehs, from Latin egressus, or going out) is the act of going out of something. Definition
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vampire tap
A vampire tap is a connection to a coaxial cable in which a hole is drilled through the outer shield of the cable so that a clamp can be connected to the inner conductor of the cable. Definition
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U interface
In Integrated Services Digital Network (ISDN) Basic Rate Interface service, a U interface is the electrical interface for the single twisted pair wire connection from a local phone company (the central office) to a home or business. Definition
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Transport layer
In the Open Systems Interconnection (OSI) communications model, the Transport layer ensures the reliable arrival of messages and provides error checking mechanisms and data flow controls. Definition
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text on nine keys (T9)
Text on nine keys (T9) is a system that lets fixed and mobile phone users send text messages by pressing a number key for each letter in the message -- effectively making a keyboard out of the nine numeric phone entry keys. Definition
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URL (Uniform Resource Locator)
A URL (Uniform Resource Locator, previously Universal Resource Locator) - usually pronounced by sounding out each letter but, in some quarters, pronounced "Earl" - is the unique address for a file that is accessible on the Internet. Definition
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RS-232C
RS-232C is a long-established standard ("C" is the current version) that describes the physical interface and protocol for relatively low-speed serial data communication between computers and related devices. Definition