RJ-21 Telco Cabling

From What The Wiki?!

port	RJ-21 Pin	wire color/pair (1)	Patch Panel Pin (2)	function	RJ-21 Pin	wire color/pair (1)	patch panel Pin (2)	function
1, 13	1	blue/ white	2, 50	RxD ( - )	26	white / blue	1, 49	RxD ( + )
	2	orange / white	4, 52	TxD ( - )	27	white / orange	3, 51	TxD ( + )
2, 14	3	green / white	6, 54	RxD ( - )	28	white / green	5, 53	RxD ( + )
	4	brown / white	8, 56	TxD ( - )	29	white / brown	7, 55	TxD ( + )
3, 15	5	grey / white	10, 58	RxD ( - )	30	white / grey	9, 57	RxD ( + )
	6	blue/ red	12, 60	TxD ( - )	31	red / blue	11, 59	TxD ( + )
4, 16	7	orange / red	14, 62	RxD ( - )	32	red / orange	13, 61	RxD ( + )
	8	green / red	16, 64	TxD ( - )	33	red / green	15, 63	TxD ( + )
5, 17	9	brown / red	18, 66	RxD ( - )	34	red / brown	17, 65	RxD ( + )
	10	grey / red	20, 68	TxD ( - )	35	red / grey	19, 67	TxD ( + )
6, 18	11	blue/ black	22, 70	RxD ( - )	36	black / blue	21, 69	RxD ( + )
	12	orange / black	24, 72	TxD ( - )	37	black / orange	23, 71	TxD ( + )
7, 19	13	green / black	26, 74	RxD ( - )	38	black / green	25, 73	RxD ( + )
	14	brown / black	28, 76	TxD ( - )	39	black / brown	27, 75	TxD ( + )
8, 20	15	grey / black	30, 78	RxD ( - )	40	black / grey	29, 77	RxD ( + )
	16	blue/ yellow	32, 80	TxD ( - )	41	yellow / blue	31, 79	TxD ( + )
9, 21	17	orange / yellow	34, 82	RxD ( - )	42	yellow / orange	33, 81	RxD ( + )
	18	green / yellow	36, 84	TxD ( - )	43	yellow / green	35, 83	TxD ( + )
10, 22	19	brown / yellow	38, 86	RxD ( - )	44	yellow / brown	37, 85	RxD ( + )
	20	grey / yellow	40, 88	TxD ( - )	45	yellow / grey	39, 87	TxD ( + )
11, 23	21	blue/ purple	42, 90	RxD ( - )	46	purple / blue	41, 89	RxD ( + )
	22	orange / purple	44, 92	TxD ( - )	47	purple / orange	43, 91	TxD ( + )
12, 24	23	green / purple	46, 94	RxD ( - )	48	purple / green	45, 93	RxD ( + )
	24	brown / purple	48, 96	TxD ( - )	49	purple / brown	47, 95	TxD ( + )
N/A	25	grey / purple		NC	50	purple / grey		NC

(1) Colors of Systimax® SCS 1061c multipair 25x2 PowerSum.
(2) Pins of 24 x RJ45 patchpanel, Brand-Rex, type GigaPLUS (cat. 5E)