11
SHORT HAUL MODEM (SHM-FSK)
Figure 2-2
is a pinout of the RS-232 port.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
SECONDARY TRANSMITTED DATA
DCE TRANSMITTER SIGNAL ELEMENT TIMING
SECONDARY RECEIVED DATA
RECEIVER SIGNAL ELEMENT TIMING
LOCAL LOOPBACK
SECONDARY REQUEST TO SEND
DATA TERMINAL READY
SIGNAL QUALITY DETECTOR
RING INDICATOR
DATA SIGNAL RATE SELECTOR
DTE TRANSMITTER SIGNAL ELEMENT TIMING
TEST MODE
PROTECTIVE GROUND
TRANSMITTED DATA
RECEIVED DATA
REQUEST TO SEND
CLEAR TO SEND
DATA SET READY
SIGNAL GROUND / COMMON RETURN
RECEIVED LINE SIGNAL DETECTOR
+ VOLTAGE
- VOLTAGE
SECONDARY RECEIVED LINE SIGNAL INDICATOR
SECONDARY CLEAR TO SEND
SIGNAL
DESTINATION
PIN
NUMBER
PIN
NUMBER
SIGNAL
DESTINATION
Figure 2-2. Pinout of the RS-232 Port.
