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