Fast Ethernet 12-port Cable Pinouts

The Fast Ethernet 12-port PIC has one VHDCI connector port on its faceplate (see Figure 91), which accepts the RJ-21 cable supplied with the PIC (see Figure 92).

Figure 91: Fast Ethernet 12-port PIC

Figure 92: VHDCI to RJ-21 Cable

Table 30 describes the RJ-21 cable pinouts.

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

Table 30: RJ-21 Pin Assignments

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