3. Green — Audio Output (line level)
4. Grey — Ground
5. Red — Digital Input
6. Pink — Digital Output
7. Purple — Reserved Wire, do not connect.
8. White — Reserved Wire, do not connect.
l * — Relay
l ** — Switch
l M — Microphone
l S — Speaker
l AUX1 — Brown Auxiliary Power Wire, labeled AUX PWR
l AUX2 — Blue Auxiliary Power Wire
Connecting to Power and External Devices 16