INSYS Pocket ISDN
Connections and LEDs
21
6.2
Rear panel
Figure 3: Connections on the rear panel of the device
Description
Colour
DC
Power supply (only the delivered power supply unit must be used)
ISDN
ISDN interface (S0 interface)
RS232
Serial interface
Table 6: Description of the connections on the rear panel of the device
6.3
Pin Assignment of the Serial Interface
Figure 4: 9-pin Sub-D socket at the device
Pin
Signal
Description
1
DCD
Data Carrier Detect
2
RXD
Receive Data
3
TXD
Transmit Data
4
DTR
Data Terminal Ready
5
GND
Ground
6
DSR
Data Set Ready
7
RTS
Request To Send
8
CTS
Clear To Send
9
RI
Ring Indication
Table 7: Description of the pin allocation of the Sub-D socket
RS232
DC
ISDN
