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Terms that are on use on this site.

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There are 8 entries in the glossary.

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Term Definition
D ChannelThe D channel is a packet-switched channel that carries signaling and control for B channels. In Basic Rate ISDN (BRI) applications, it can also support customer packet data traffic at speeds up to 9.6 kilobits per second.
Data Terminal Equipment (DTE)Refers to devices such as personal computers or data terminals, as opposed to Data Communications Equipment (DCE) such as printers or modems.
dBSee decibel.
Decibel (dB)The logarithmic unit of signal power ratio most commonly used in telephony. It is used to express the relationship between two signal powers, usually between two acoustic, electric, or optical signals.
Digital Signal 0 (DS0)A 64 Kbps high-bandwidth circuit, that delivers quality that typically can't be duplicated with unconditioned analog circuits.
Digital Signal 1 (DS1)A circuit that provides virtually error-free voice, video and data transmission at speeds up to 1.544 Mbps. This is synonymous  with a T1 circuit and contains 24 DS0 channels.
Digital Signal 3 (DS3)A circuit coontaining 672 voice-grade channels capable of handling multiple data streams in high volume at speeds up to 44.736 Mbps (commonly referred to as a 45 Megabit channel). This is synonymous with a T3 and contains the equivalent of 28 DS1 (T1) circuits.
Digital Subscriber Line (DSL)A generic name for a group of enhanced-speed digital services provided by telephone service providers. DSL services run on twisted-pair wires and can carry both voice and data.

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