238 List of terms

DRAM

Dynamic Random Access Memory. A high density type of semi-conductor memory. It typically has slower access time than SRAM and requires external memory refresh circuitry.

DSP

Digital Signal Processing. A specialized computer chip that performs speedy and complex operations on digitized waveforms. Useful in processing sound and video.

DTMF

Dual Tone Multi-frequency. A term describing push-button or touch-tone dialing.

EMC

Electro-Magnetic Compatibility. Refers to equipment units that perform their functions without causing or suffering unacceptable electromagnetic interference from other equipment in the same environment.

EMI

Electro-Magnetic Interference. Unwanted electromagnetic coupling, such as a ham radio heard on an electric organ or church music heard in hearing aids. Also known as “static”.

Firmware

Hardwired logic, software, data, and programming instructions such as that stored by threading wires through ferrite cores. May also refer to software programmed in the factory or burnt in the field, and is semi-permanently stored within ROM.

Flash memory

Electrically erasable memory that is non-volatile (not affected by power disruptions).

FTP

File Transfer Protocol.

HTTP

Hypertext Transfer Protocol.

ICB

Integrated Conference Bridge.

IP

Internet Protocol.

IPE

Intelligent Peripheral Equipment. A range of cards that contain micro- processors that provide off-loading of the CPU function and the

553-3001-358/555-4001-135 Standard 02.00 July 2006

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Nortel Networks 553-3001-358, 555-4001-135 manual Firmware, Flash memory