UTC RETAIL 3170 Series Guía de usuario Pagina 6

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11823027 Rev A - 6 - © 2012 UTC RETAIL
Motherboard Jumpers and Connectors
Serial Port Power Selection
The 3170 Series COM1 serial port is shipped factory set for modem operation. Pin 1 is for DCD (Data Carrier
Detect), pin 9 for RI (Ring Indicator). Therefore, JP3 (COM1) has pins 1 and 2 jumpered.
COM2, COM3 and COM4 are shipped factory set to provide +5VDC on Pin 9. Therefore, JP3 has pins 9 and 10
jumpered, JP7 and JP6 have pins 1 and 2 jumpered, and pins 9 and 10 jumpered.
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