Appendix C. Serial Port Interface
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RS232 Pinouts and connections. RS232 Pinout data lines explained in detail.
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Amazon.com: Your Cable Store 25 Foot DB25 25 Pin Serial Port Cable Male/Female RS232 : Electronics
RS232 connector pin assignment
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USB to DB 25pin RS232 Serial for Epson TM-T88III 25pin Thermal Receipt Printer Cable
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Serial Direct Cable Connection, DB9, DB25, COM Ports and Pinouts
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