HP vc4820T - Thin Client Hardware Reference Manual page 27

Table 2-2 COM Port Functionality
pin #
pin 1
pin 2
pin 3
pin 4
pin 5
pin 6
pin 7
pin 8
pin 9
CAUTION:
before you configure it. See
on page 19
NOTE: The jumpers in the following table are in the same orientation illustrated in
Port Jumper Locations on the System Board on page
Table 2-3 Configuring Serial Port Power
ENWW
COM1
(Standard)
DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
RI
To prevent severe equipment damage, carefully verify the location of the COM Port Jumper
Figure 2-10 Serial Port Jumper Locations on the System Board
for locations.
COM2–Cable COM3
Connection
(Customized)
(Customized)
+5V/DCD +5V/+12V/DCD
RXD/TXD/RXD (TTL)/ RXD/TXD
TXD (TTL)
TXD/RXD/TXD (TTL)/ TXD/RXD
RXD (TTL)
DTR/+5V DTR/+5V/+12v
GND GND
DSR DSR
RTS RTS
RXD/TXD/RXD (TTL)/ CTS
TXD (TTL)
TXD/RXD/TXD (TTL)/ RI
RXD (TTL)
19.
Configuring Powered Serial Ports
COM4
(Customized)
+5V/+12V/DCD
RXD/TXD
TXD/RXD
DTR/+5V/+12v
GND
DSR
RTS
CTS
RI
Figure 2-10 Serial
21