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P1 pin
P1 signal
Note
Direction
P2 signal
P2 pin
9
RTS–
No connect
10
CTS–
No connect
20
DTR–
No connect
21
MODE2
No connect
22
MODE1
GND
23
MODE0
GND
24
MODE3
No connect
25
DSR–
No connect
DTE X.21 serial cable
Order code: SR0018013E6
Figure 35: DTE X.21 serial cable
Table 54: DTE X.21 serial cable description
P1 pin
P1 signal
Note
Direction
P2 signal
P2 pin
1 14
TXD+ TXD–
Twisted pair
→ →
T+ T–
2 9
4 17
RXC+ RXC– Twisted pair
← ←
S+ S–
6 13
5 18
RXD+ RXD– Twisted pair
← ←
R+ R–
4 11
8 9
RTS+ RTS–
Twisted pair
→ →
C+ C–
3 10
11 10
CTS+ CTS–
Twisted pair
← ←
I+ I–
5 12
26 Shield
GND
—
GND
1 8 Shield
2
TXCE+
No connect
3
TXC+
No connect
6
DCD+
No connect
DTE X.21 serial cable
Installation — Hardware Components
August 2013 107
Содержание Secure Router 2330
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