C. Cables and Pin Assignments
C-24
February 2001
8700-A2-GB25-10
71
PORT2_TXC_L
Port 2
—
N/C
24
PORT2_RD_H
Port 2
2
TD(A)
73
PORT2_RD_L
Port 2
14
TD(B)
23
PORT2_RXC_H
Port 2
—
N/C
72
PORT2_RXC_L
Port 2
—
N/C
21
PORT2_TT_H
Port 2
17
RXC(A)
70
PORT2_TT_L
Port 2
9
RXC(B)
64
PORT2_RTS_H
Port 2
8
CD(A)
14
PORT2_RTS_L
Port 2
10
CD(B)
67
PORT2_CTS_H
Port 2
—
N/C
17
PORT2_CTS_L
Port 2
—
N/C
16
PORT2_LSD_H
Port 2
4
RTS(A)
65
PORT2_LSD_L
Port 2
19
RTS(B)
66
PORT2_DSR
Port 2
20
DTR
15
PORT2_DTR
Port 2
6
DSR
18
PORT2_TM
Port 2
—
N/C
N/C
—
—
—
N/C
63
PORT2_LL
Port 2
—
N/C
68
GND
Port 2
7
GND
19
PORT2_RL
Port 2
N/C
74
GND
Port 2
23
GND
—
—
—
—
Port 2
Port 2
22
23
RI
GND
32
PORT3_TD_H
Port 3
3
RD(A)
81
PORT3_TD_L
Port 3
16
RD(B)
34
PORT3_TXC_H
Port 3
—
N/C
83
PORT3_TXC_L
Port 3
—
N/C
36
PORT3_RD_H
Port 3
2
TD(A)
85
PORT3_RD_L
Port 3
14
TD(B)
35
PORT3_RXC_H
Port 3
—
N/C
84
PORT3_RXC_L
Port 3
—
N/C
33
PORT3_TT_H
Port 3
17
RXC(A)
Table C-11. EIA-530-A Crossover Cable Pinouts (2 of 4)
100-Pin Plug
Net Name
DB25 Socket
Pin Number
Net Name