Nortel 4134 安装指导
DCE X.21 serial cable
83
P1 pin
P1 signal
Note
Direction
P2 signal
P2 pin
22
MODE1
No connect
23
MODE0
No connect
24
MODE3
GND
25
DSR–
No connect
DCE X.21 serial cable
Order code: SR0018014E6
Figure 26
DCE X.21 serial cable
DCE X.21 serial cable
Table 41
DCE X.21 serial cable description
DCE X.21 serial cable description
Pin 1
P1 signal
Note
Direction
P2 signal
Pin 2
1
14
14
TXD+
TXD–
TXD–
Twisted
pair
pair
→
→
R+
R–
R–
4
11
11
2
15
15
TXCE+
TXCE–
TXCE–
Twisted
pair
pair
→
→
S+
S–
S–
6
13
13
5
18
18
RXD+
RXD–
RXD–
Twisted
pair
pair
←
←
T+
T–
T–
2
9
9
8
9
9
RTS+
RTS–
RTS–
Twisted
pair
pair
→
→
I+
I–
I–
5
12
12
11
10
10
CTS+
CTS–
CTS–
Twisted
pair
pair
←
←
C+
C–
C–
3
10
10
26
Shield
Shield
GND
—
GND
1
8
Shield
8
Shield
Nortel Secure Router 4134
Installation — Hardware Components
NN47263-301
01.02
Standard
10.0
7 August 2007
Copyright © 2007, Nortel Networks
.