Patton electronics SmartNode 1200 Getting Started Manual page 92

SmartNode 1000 and 2000 Series Getting Started Guide
Figure 60 shows the cables that are required to connect the serial port of a SmartNode 2300 to a standard X.21
or V.35 network termination unit (NTU).
S LO
T
3
S LO
T
2
S LO
T
1
SmartNode
2300
SmartNode
2300
Connecting cables
DB-25, male
TXDa 12
TXDb 11
RXDa 9
RXDb 10
SETa 22
SETb 21
INDa 23
INDb 16
CNTa 14
CNTb 13
RTSa 8
CTSb 25
SIGNAL GROUND 7
DTR 6
DCD 4
DB-25, male
TXDa 12
TXDb 11
RXDa 9
RXDb 10
RXCa 22
RXCb 21
TXCa 23
TXCb 16
RTS 8
DTR 6
DCD 4
CTS 25
SIGNAL GROUND 7
FRAME GROUND 1
Figure 60. V.35 and X.21 modem connection
6 • SmartNode 2300 installation
X.21
2 TXDa
9
4
11
6
13
5
12
3
10
8
V.35
P
S
R
T
V
X
Y
a
C
H
F
D
B
A
Leased-line modem
Modem
NTU
Modem
NTU
92