• Overview
• TRS Pinouts
  • Straight-Through
  • Crossover
• DB-9 Pinouts
  • Straight-Through
  • Crossover

Overview

Serial cables are standardized to have 3 pins for communication:

• Send (TX)
• Receive (RX)
• Ground (GND)

However, the position of those pins on each side of the cable may vary depending on the type of devices that are communicating

TRS Pinouts

TRS Straight-Through

TRS Crossover

DB-9 Pinouts

DB-9 Straight-Through

DB-9 Crossover