Call Us +44 0207 378 1400

clarity and precision

Glossary

Search for glossary terms (regular expression allowed)
Term Main definition
Category 2

Also called CAT-2. Unshielded twisted pair used for transmission at frequencies up to 4MHz. Used in analog and digital telephone applications. Category 2 cable is not suitable for networking applications. See Chapter 1 for more information. Not a recognized medium by ANSI/TIA-568.C.

Hits - 741
Category 3

Also called CAT-3. Unshielded twisted pair with 100 ohm impedance and electrical characteristics supporting transmission at frequencies up to 16MHz. Used for 10Base-T Ethernet and digital voice applications. Recognized by the ANSI/TIA-568-C standard. See Chapters 1 or 7 for more information.

Hits - 1603
Category 4

Also called CAT-4. Unshielded twisted pair with 100 ohm impedance and electrical characteristics supporting transmission at frequencies up to 20MHz. Not used and not supported by the standards. See Chapter 1 for more information.

Hits - 640
Category 5

Also called CAT-5. Unshielded twisted pair with 100 ohm impedance and electrical characteristics supporting transmission at frequencies up to 100MHz. Category 5 is not a recognized cable type for new installations by the ANSI/TIA-568-C standard, but its requirements are included in the standard to support legacy installations of Category 5 cable. See Chapters 1 or 7 for more information.

Hits - 874
Category 5e

Also called CAT-5e or Enhanced CAT-5. Recognized in ANSI/TIA-568-C. Category 5e has improved specifications for NEXT, PSNEXT, Return Loss, ACRF (ELFEXT), PSACRF (PS-ELFEXT), and attenuation as compared to Category 5. Like Category 5, it consists of unshielded twisted pair with 100 ohm impedance and electrical characteristics supporting transmission at frequencies up to 100MHz. See Chapters 1 or 7 for more information.

Hits - 1398
Category 6

Also called CAT-6. Recognized in ANSI/TIA-568-C, Category 6 supports transmission at frequencies up to 250MHz over 100 ohm twisted pair. See Chapters 1 or 7 for more information.

Hits - 741
Category 6A

Also called CAT-6A. Recognized in ANSI/TIA-568-C, Category 6A supports transmission at frequencies up to 500MHz over 100 ohm twisted pair. This is the only category cable required to meet alien crosstalk specifications. See Chapters 1 or 7 for more information.

Hits - 842
CCIR

Consultative Committee for International Radio. Replaced by the International Telecommunications Union

Hits - 692
CDMA Code division multiple access

In time division multiplexing (TDM), one pulse at a time is taken from several signals and combined into a single bit stream.

Hits - 651
Cell Planner

Engineer responsible for the RAN design and site requirements. Documented in the RDS.

Hits - 717
Cellular Antenna System

Includes all feeders, connections, grounding, MHA, combiners, antennas from the antenna to the final radio equipment (BTS / NodeB) connection.

Hits - 913
Center Conductor

Centre Conductor: The solid or stranded wire in the middle of the coaxial cable. The conductor diameter is measured by the American Wire Gauge (AWG).

Hits - 690
Center wavelength (laser)

The nominal value central operating wavelength defined by a peak mode measurement where the effective optical power resides.

Hits - 762
Center wavelength (LED)

The average of two wavelengths measured at the half amplitude points of the power spectrum.

Hits - 702
Central member

The center component of a cable, which serves as an antibuckling element to resist temperature-induced stresses. Sometimes serves as a strength element. The central member is composed of steel, fiberglass, or glassreinforced plastic.

Hits - 703