Welcome to my RJ11 and RJ45 pin-out cheat sheet! I referred to this a lot when I was first pulling cable, but really all you need to do is memorize the two end types.

(Click the image to embiggen.)

Wire colors:
wo = white orange
o = orange
wg = white green
bl = blue
wbl = white blue
g = green
wbr = white brown
b = brown

Pin out for CAT-5 Plug

Make both ends the same (make both ends B): wo o wg bl wbl g wbr b

RJ45 for an ethernet jack

Ethernet is on 1-2-3-6

1=wo
2=o
3=wg
6=g

Crossover

1-3 and 2-6 are reversed (make one A end, one B end): order is 3 6 1 4 5 2 instead of 1 2 3 4 5 6

RJ11 Phone Jack

6-pair jack = 3 & 4
8-pair jack = 4 & 5

Two Jacks on CAT-5

Colors:
1 – 2 – 3 – 4 – 5 – 6 – 7 – 8
WO O WG BL WB G WBR BR

Jack 1:
1 – 2 – 3 – 4 – 5 – 6 – 7 – 8
WO O WG G

Jack 2:
1 – 2 – 3 – 4 – 5 – 6 – 7 – 8
WB B WBR BR

And here’s some good info.