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Serial Ports
Serial PortsSerial Ports
Serial Ports
All serial (COM) ports can be custom configured in either standard mode or powered mode. By
repositioning the jumpers (provided) on the system board and on the COM port PCI add-in card (some
models), each COM power can achieve power on pin 1 or pin 9. The illustration and table below
indicate the COM port assignments and voltage supported for each COM port.
COM port assignment
COM port assignmentCOM port assignment
COM port assignment
Description
DescriptionDescription
Description
Standard Mode
Standard ModeStandard Mode
Standard Mode
+5V
+5V+5V
+5V +9V
+9V+9V
+9V
+12V
+12V+12V
+12V
1
COM1 (yellow)
Yes Yes Yes Yes
2
COM2
Yes Yes
No
Yes
The following illustrations show how to position the jumpers on the system board and on the COM port
PCI add-in card (available on some models) to achieve power on pin 1 or pin 9.
P16 and P127 are located on the system board behind the COM1 port.
QuickSpecs
HP rp5700 Long Lifecycle Desktop PC
HP rp5700 Long Lifecycle Desktop PCHP rp5700 Long Lifecycle Desktop PC
HP rp5700 Long Lifecycle Desktop PC
Technical Specifications - Communications
DA - 12758 North America — Version 18 — August 20, 2008
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