User:CableCat


Base 10 vs base 12

Decimal base Duodecimal base
Fraction Positional representation Positional representation Fraction
1/2 0.5 0.6 1/2
1/3 0.3 0.4 1/3
1/4 0.25 0.3 1/4
1/5 0.2 0.2497 1/5
1/6 0.16 0.2 1/6
1/7 0.142857 0.186A35 1/7
1/8 0.125 0.16 1/8
1/9 0.1 0.14 1/9
1/10 0.1 0.12497 1/A
1/11 0.09 0.1 1/B
1/12 0.083 0.1 1/10
1/13 0.076923 0.0B 1/11
1/14 0.0714285 0.0A35186 1/12

Ethernet splitter pinouts

Based on: Power_over_Ethernet#Pinouts

10/100 Mb/s ethernet splitter
Passtrough switch port Pais in cable Passtrough device 10/100 mode A,
mixed DC & data

White/orange stripe
White/orange stripe
White/orange stripe 		Rx + DC +

Orange solid
Orange solid
Orange solid 		Rx − DC +

White/green stripe
White/green stripe
White/green stripe 		Tx + DC −

Blue solid
Blue solid 		Unused

White/blue stripe
White/blue stripe

Green solid
Green solid
Green solid 		Tx − DC −

White/brown stripe
White/brown stripe 		Unused

Brown solid
Brown solid
Extra switch port Pais in cable Extra device 10/100 mode A,
mixed DC & data

White/orange stripe
Blue solid
White/orange stripe 		Rx + DC +

Orange solid
White/blue stripe
Orange solid 		Rx − DC +

White/green stripe
White/brown stripe
White/green stripe 		Tx + DC −

Blue solid
Blue solid 		Unused

White/blue stripe
White/blue stripe

Green solid
Brown solid
Green solid 		Tx − DC −

White/brown stripe
White/brown stripe 		Unused

Brown solid
Brown solid

Twisted pair ethernet variants

Comparison of twisted-pair-based Ethernet technologies

Name Standard (IEEE 802.3 clause number) Speed (Mbit/s)[A] Pairs required Lanes per direction Data rate efficiency (bit/s/Hz)[B] Line code Symbol rate per lane (MBd) Bandwidth (MHz)[C] Max distance (m) Cable[D] Cable rating (MHz)
10BASE-T 802.3i-1990 (CL14) 10 2 1 1 PE 10 10 100 Cat 3 16
100BASE-TX 802.3u-1995 (CL25) 100 2 1 3.2 4B5B MLT-3 NRZ-I 125 31.25 100 Cat 5 100
1000BASE‑T 802.3ab-1999 (CL40) 1,000 4 4 4 TCM 4D-PAM-5 125 62.5 100 Cat 5 100
2.5GBASE-T 802.3bz-2016 (CL126) 2,500 4 4 6.25 64B65B PAM-16 128-DSQ 200 100 100 Cat 5e 100
5GBASE-T 802.3bz-2016 (CL126) 5,000 4 4 6.25 64B65B PAM-16 128-DSQ 400 200 100 Cat 6 250
10GBASE-T 802.3an-2006 (CL55) 10,000 4 4 6.25 64B65B PAM-16 128-DSQ 800 400 100 Cat 6A 500


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