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• M320 Fast Ethernet 48-port Cable Pinouts    

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M320 Fast Ethernet 48-port Cable Pinouts

The Fast Ethernet 48-port PIC has four VHDCI connector ports on its faceplate (see Figure 1), each of which accepts one of the four RJ-21 cables supplied with the PIC (see Figure 2). Each VHDCI connector port supports 12 Ethernet ports.

Figure 1: Fast Ethernet 48-port PIC

Figure 2: VHDCI to RJ-21 Cable

Note: RJ-21 pin numbers 25 and 50 do not appear in the table because they are ground connectors.

Table 1: RJ-21 Pin Assignments

Ethernet Port Numbers	RJ-21 Pin Assignment
	TX -	TX +	RX -	RX +
0, 12, 24, 36	2	27	1	26
1, 13, 25, 37	4	29	3	28
2, 14, 26, 38	6	31	5	30
3, 15, 27, 39	8	33	7	32
4, 16, 28, 40	10	35	9	34
5, 17, 29, 41	12	37	11	36
6, 18, 30, 42	14	39	13	38
7, 19, 31, 43	16	41	15	40
8, 20, 32, 44	18	43	17	42
9, 21, 33, 45	20	45	19	44
10, 22, 34, 46	22	47	21	46
11, 23, 35, 47	24	49	23	48