18
4.4
RS232 Serial Port
The modem supports a standard RS232 serial interface via its 9 pin Sub-D connector, shown below. In
line with serial communication terminology the CT63 NG Terminal should be considered as the data
circuit-terminating equipment (DCE) and the external application or computer as the data terminating
equipment (DTE). The maximum baud rate to communicate with the CT63 NG Terminal is 230400 kbit/
s.
Some functions need to be configured or activated using module specific AT commands. Please refer to
the appropriate AT command manual referenced in Section xyz for further details.
NOTICE
The RS232 interface requires full RTS / CTS Flow Control support by the remote station connecting to
the terminal. If you just have Rx/Tx/GND connected in the serial interface, you have to connect the RTS
with the CTS pin in order to be able to communicate with the module (Pins 7 and 8 on the DCE, i.e.
modem; see picture below).
Figure 5: Looping RTS with CTS in the modem
PIN
Signal
Direction
Limits
Description
1
DCD
Output
> + 4V
<- 4 V
Data carrier detect
2
RD
Output
> + 4V
<- 4 V
Received data
3
TD
Input
> + 2,4V
< 0.8 V
Transmitted data
4
DTR
Input
> + 4V
< 0.8 V
Data terminal ready
5
GND
-
0 V
Ground connection
6
DSR
Output
> + 4V
< - 4 V
Data set ready
7
RTS
Input
> + 2,4V
< 0.8 V
Request to send
8
CTS
Output
> + 4V
< - 4 V
Clear to send
9
RI
Output
> + 4V
< - 4 V
Ring indicator
Table 6: Electrical characteristics of the serial port signals
Содержание CT63 NG
Страница 1: ...CT63 NG Terminal User Manual Revision 1 2...
