Attenuation / Next Loss Frequency (MHz) Category 3 (dB) Category 4 (dB) Category 5 (dB) 1.0 0.4/58 0.1/65 0.1/65 4.0 0.4/46 0.1/58 0.1/65 8.0 0.4/40 0.1/52 0.1/62 10.0 0.4/38 0.1/50 0.1/60 16.0 0.4/34 0.2/46 0.2/56 20.0 0.2/44 0.2/54 25.0 0.2/52 31.25 0.2/50 62.5 0.3/44 100.0 0.4/40

100-OHM UTP CABLE Each four-pair cable shall be terminated in an eight-position modular jack in the work area. The 100-ohm UTP telecommunications outlet shall meet the requirements described in EIA/TIA-570. 150 OHM STP-CABLE The telecommunications connector used for terminating the 150-ohm STP cable shall be that specified by ANSI/IEEE 802.5 for the media interface connector. […]

Standard Networking Configurations ATM 155 Mbps uses pairs 2 and 4 (pins 1-2, 7-8) Ethernet 10Base-T uses pairs 2 and 3 (pins 1-2, 3-6) Ethernet 100Base-T4 uses pairs 2 and 3 (4T+) (pins1-2, 3-6) Ethernet 100 Base-T8 uses pairs 1,2,3 and 4 (pins 4-5, 1-2, 3-6, 7-8) Token-Ring uses pairs 1 and 3 (pins 4-5, […]

Four-pair 100 ohm UTP cables The cable consists of 24 AWG thermoplastic insulated conductors formed into four individually twisted pairs and enclosed by a thermoplastic jacket. Four-pair, 22 AWG cables which meet the transmission requirements may also be used. Four-pair, shielded twisted pair cables which meet the transmission requirements may also be used. The diameter […]

Unshielded data cables should not be installed near sources of electromagnetism. There is a standard that specifies these distances for structured data cabling systems. EIA/TIA-569, the cabling pathways standard, specifies the following Minimum Separation Distance from Power Source at 480V or less: Condition < 2kVA 2-5kVA < 5kVA Unshielded power lines or electrical equipment in proximity to […]

Up to 50,000 users Facilities up to 10 million square feet 90 meter horizontal distance limit between closet and desktop 4 pairs of conductors to each outletâ??all must be terminated 25-pair cables may not be used (crosstalk problems) May not use old wiring already in place Bridge taps and standard telephone wiring schemes may not […]

Frequency(MHz) Category 3(dB)Attn/NEXT Category 4(dB)Attn/NEXT Category 5(dB)Attn/NEXT 0.064 0.9/- 0.8/- 0.8/- 0.150 -/53 -/68 -/74 0.256 1.3/- 1.1/- 1.1/- 0.512 1.8/- 1.5/- 1.5/- 0.772 2.2/43 1.9/58 1.8/64 1.0 2.6/41 2.2/56 2.0/62 4.0 5.6/32 4.3/47 4.1/53 8.0 8.5/27 6.2/42 5.8/48 10.0 9.7/26 6.9/41 6.5/47 16.0 13.1/23 8.9/38 8.2/44 20.0 10.0/36 9.3/42 25.0 10.4/41 31.25 11.7/39 62.5 […]

1. Do not exceed a pulling tension of 20% of the ultimate breaking strength of the cable (these figures are available from the cable maker.) 2. Lubricate the raceway generously with a suitable pulling compound. (Check with the manufacturer for types of lubricants that are best suited to the type of cable.) 3. Use pulling […]

RJ45 PLUG RJ45 PLUG T2 1 White/Orange 1 TxData + pair 2/- R2 2 Orange 2 TxData – T3 3 White/Green 3 RecvData + R1 4 Blue 4 pair3 T1 5 White/Blue 5 R3 6 Green 6 RecvData – T4 7 White/Brown 7 T4 8 Brown 8

This cable is used to cascade hubs, or for connecting two Ethernet stations back-to-back without a hub. Note pin numbering of straight-thru patch cord. RJ45 PLUG RJ45 PLUG 1 Tx+ Rx+ 3 2 Tx Rx- 6 3 RX+ Tx+ 1 6 Rx+ Tx- 2