Internet Radio Linking Project - Parallel Port Pin Assignments

Parallel Port Pin Assignments

3 PTT 4 Aux pin 1 (active high at parallel port) 5 Aux pin 2 (active high at parallel port) 6 Aux pin 3 (active high at parallel port) 10 DTMF 4 11 COS (active low on squelch open) 12 DTMF 3 13 DTMF 2 15 DTMF 1 18 Ground 19 Ground 20 Ground 21 Ground 22 Ground 23 Ground 24 Ground 25 Ground (Also ground DB25 shell)

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