UEEDV0008 Telecommunications – Master Revision Flashcards

Vocabulary-style flashcards covering structured cabling standards, installation limits, testing parameters, and category specifications for the UEEDV0008 Telecommunications revision.

LAN

Connects devices within a limited area such as a home, school, or office.

WAN

Connects multiple LANs across large geographical areas.

Six Functional Elements of Structured Cabling

1. Work Area (WA) 2. Horizontal Cabling (HC) 3. Telecommunications Room (TR) 4. Backbone Cabling (BC) 5. Equipment Room (ER) 6. Entrance Facility (EF)

Cat 3 / Class C

$$16\,MHz$$

Cat 5e / Class D

$$100\,MHz$$

Cat 6 / Class E

$$250\,MHz$$

Cat 6A / Class EA

$$500\,MHz$$

Cat 7 / Class F

$$600\,MHz$$

Minimum and Recommended Classes

Minimum Class = Class E; Recommended Class = Class EA

ISO 11801.1 Clause 6.3

The specific clause related to the structured cabling standards mentioned.

Maximum Hauling Tension

$$110\,N$$

Bend Radius Under Tension

$$8 \times \text{cable diameter}$$

Bend Radius At Rest

$$4 \times \text{cable diameter}$$

Maximum Pull Section

$$30\,m$$

Maximum Bends

$$2 \times 90^\circ$$

Maximum Cat 6 Cables on Catenary

$$48$$

Separation Requirements (LV)

$$50\,mm$$

Separation Requirements (HV Multicore)

$$300\,mm$$

Separation Requirements (HV Single Core)

$$450\,mm$$

Performance Separation

$$300\,mm$$

Wiremap

Testing for shorts, opens, reversals, split pairs, and crossed pairs.

Propagation Delay

Signal travel time.

Delay Skew

The difference in propagation delay between pairs, ideally $25$–$50\,ns$.

Channel Length

$$100\,m$$

Permanent Link

$$90\,m$$

Insertion Loss

Attenuation.

Return Loss

Reflected signal.

NEXT

Near-End Crosstalk.

PS NEXT

Power Sum NEXT.

ACR

Attenuation to Crosstalk Ratio.

ACR-F

Far End Crosstalk Ratio.

Alien Crosstalk

Interference from adjacent cables.

DC Loop Resistance

Cable resistance measurement.

Twisted pairs

Used inside Category cable (4 pairs) to reduce EMI and crosstalk.

Cat 5 untwist limit

$$13\,mm$$

Cat 6 untwist limit

$$10\,mm$$

Cat 6A untwist limit

$$5\,mm$$

Common Terminations

Patch Panels and Modular Outlets.