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A feature that allows inward directed calls to a PBX to reach a specific PBX extension, this process is automated. Dialing within the
network
Digital
Digital communication allows higher speeds of transmission of data with a lower rate of error than is possible with analog technology. A
digital signal is detected and regenerated and amplified, any "line" noise is eliminated by digital regeneration.
DOD
Direct Outward Dialing
Automated PBX feature that provides outgoing calls to be dialed directly from the end user terminal. Dialing out the network
DS
Digital Signal
DS1
Digital Signal 1
A digital signaling rate of 1.544 Mb/s
DSL
Digital Subscriber Line. A high speed broadband end to end connection. Runs on existing infrastructure and lines, and is a
means to integrate voice and data communications.
Facilities-Based Carrier - FBC
Carriers that use their own facilities to provide services.
FCC - Federal Communications Commission
Government Agency that regulates interstate communications: licenses, rates, tariffs, standards, limitations, etc.
Fiber Optic Cable
Cable in which one or more optical fibers (a filament of transparent dielectric material, usually glass or plastic) are used as the
propagation medium
Frame Relay
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