Appendix: Iris panel dip switches and D25 pinouts

iris panel dip swtches and GPIO pinout

Iris panel dip switches and GPIO connector

SW4 = Headset autodetect.

See Headset autodetect.

DB25 Male analog expansion connector(J9 on rear panel)

Pin 13 Auxiliary power with 0.2A resettable fuse (polyfuse)
Pins 5,6,18,19 Analog ground (OVA)

Two jumper switches select the power that runs to J9, pin 13:

  • J38 - selects either GND or Power to pin 13
    • 1-2 = select power (power is selected by J49)
    • 2-3 = select GND
  • J49
    • 1-2 = select 5VA power
    • 2-3 = select 12V power

DB25 Female expansion GPIO (J11 on rear panel)

Pins 8,9 Digital Ground
Pins 20,21 5V power with 0.5A resettable fuse (polyfuse)