BICSI RCDD flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Horizontal channel length

Maximum horizontal channel is 100 m total: 90 m permanent link plus 10 m of patch cords at the work area and cross-connect.

Consolidation point

A single transition point in horizontal cabling located in accessible ceiling or floor space; only one is allowed per horizontal run.

MUTOA

A multi-user telecommunications outlet assembly serving several work areas; patch cord plus permanent link must not exceed the 100 m channel.

Bend radius rule

During installation, keep at least four times the cable outside diameter for UTP and ten times for fiber to prevent damage.

Cat 6A

Balanced twisted-pair rated to 500 MHz and supports 10GBASE-T to 100 m; often shielded and requires proper grounding and bonding.

OM3 and OM4

Laser-optimized 50/125 multimode fibers supporting 10GBASE-SR to 300 m and 550 m respectively, used for building backbones.

APC connector

An angled physical contact fiber connector with an 8-degree endface that reduces back reflection; it must not be mated with UPC.

T568A versus T568B

Two acceptable pin/pair assignments for twisted-pair outlets that differ in pairs 2 and 3; use one consistently throughout a project.

Plenum cable

CMP-rated cable with low smoke and flame spread, required in plenum air-handling spaces; CMR is used in risers.

Fiber loss budget

Total allowed loss equals cable attenuation plus connector loss (about 0.75 dB per mated pair) plus splice loss (about 0.3 dB each).

Entrance facility

The space where outside plant cables enter the building and meet inside plant, housing protectors and the demarcation point.

Telecommunications room

A dedicated space serving a floor area, typically up to about 1,000 m2, housing the horizontal cross-connect and active equipment.

TR environmental targets

Telecommunications rooms should be maintained at 18-27 C and 30-55 percent relative humidity with filtered positive-pressure air.

Cross-connect hierarchy

Main cross-connect in the equipment room, intermediate cross-connect in a backbone node, and horizontal cross-connect in each telecommunications room.

Conduit fill rule

Common practice allows 53 percent fill for one cable, 31 percent for two, and 40 percent for three or more cables.

Horizontal support spacing

Support horizontal cables at intervals no greater than 1.5 m (5 ft) and within 300 mm (12 in) of boxes and terminations.

TMGB

The telecommunications main grounding busbar, located in the entrance facility or equipment room, bonded to the building grounding electrode system.

Firestopping

Penetrations through rated walls and floors must be sealed with listed materials to restore the fire-resistance rating of the assembly.

802.3bt PoE

Power over Ethernet standard delivering up to 60 W (Type 3) or 90 W (Type 4) at the power sourcing equipment.

PoE cable heating

Bundled cables carrying PoE current derate; larger bundles and higher ambient temperatures reduce allowable current per conductor.

Spine-leaf topology

A data center network design where every leaf switch connects to every spine switch, supporting scalable east-west traffic.

DAS

A distributed antenna system that extends cellular coverage indoors using fiber or coaxial distribution from a central head-end.

Wi-Fi 6

IEEE 802.11ax wireless standard improving efficiency in dense environments; planning requires adequate AP density and backhaul capacity.

Critical path

The longest sequence of dependent activities in a project network; it determines the minimum project duration and has zero float.

Cost performance index

CPI equals earned value divided by actual cost; a value below 1.0 indicates the project is over budget.

Schedule performance index

SPI equals earned value divided by planned value; a value below 1.0 indicates the project is behind schedule.

Risk responses

Standard strategies for threats are avoid, mitigate, transfer, and accept; opportunities use exploit, enhance, share, and accept.

Work breakdown structure

A hierarchical decomposition of project scope into deliverables and work packages that forms the basis for estimating and scheduling.

As-built drawings

Final drawings reflecting installed conditions, including pathway layouts, cable schedules, and rack elevations, delivered at project closeout.

Cable labeling rule

Each cable receives a unique identifier, is labeled at both ends, and the identifier is recorded in the administration database.

Copper test report fields

Field tests record wire map, length, insertion loss, near-end crosstalk, and return loss for each permanent link.

TIA-606 classes

Administration classes 1 through 4 define increasing scope of labeling and record keeping, from simple to fully automated management systems.