diff --git a/configs/rpt/simpleusb.conf b/configs/rpt/simpleusb.conf
index 7dbd2f5..4a3810d 100644
--- a/configs/rpt/simpleusb.conf
+++ b/configs/rpt/simpleusb.conf
@@ -67,11 +67,15 @@ carrierfrom = usbinvert             ; no,usb,usbinvert
                                     ; no - no carrier detection at all
                                     ; usb - from the COR line on the USB sound fob (Active high)
                                     ; usbinvert - from the inverted COR line on the USB sound fob (Active low)
+                                    ; pp - from parallel port (Active high)
+                                    ; ppinvert - from the inverted parallel port (Active low)
 
 ctcssfrom = usbinvert               ; no,usb,usbinvert
                                     ; no - CTCSS decoding, system will be carrier squelch
                                     ; usb - CTCSS decoding using input from USB sound fob (Active high)
                                     ; usbinvert - from the inverted CTCSS line on the USB sound fob (Active low)
+                                    ; pp - from parallel port (Active high)
+                                    ; ppinvert - from the inverted parallel port (Active low)
 
 deemphasis = no                     ; enable de-emphasis (input from discriminator)
 
diff --git a/configs/rpt/usbradio.conf b/configs/rpt/usbradio.conf
index 90d0201..3a3e38f 100644
--- a/configs/rpt/usbradio.conf
+++ b/configs/rpt/usbradio.conf
@@ -80,6 +80,8 @@ carrierfrom = dsp           ; no,usb,usbinvert,dsp,vox
                             ; usbinvert - from the inverted COR line on the USB sound fob (Active low)
                             ; dsp - from RX noise using DSP techniques
                             ; vox - voice activated from RX audio
+                            ; pp - from parallel port (Active high)
+                            ; ppinvert - from the inverted parallel port (Active low)
 
 ctcssfrom = dsp             ; no,usb,usbinvert,dsp
                             ; no - no CTCSS decoding, system will be carrier squelch
@@ -87,6 +89,8 @@ ctcssfrom = dsp             ; no,usb,usbinvert,dsp
                             ; usbinvert - from the inverted CTCSS line on the USB sound fob (Active low)
                             ; dsp - CTCSS decoding using RX audio in DSP.
                             ; rxdemod option must be set to flat for this to work.
+                            ; pp - from parallel port (Active high)
+                            ; ppinvert - from the inverted parallel port (Active low)
 
 rxdemod = flat              ; input type from radio: no,speaker,flat
                             ; no - RX audio input not used
diff --git a/configs/samples/simpleusb.conf.sample b/configs/samples/simpleusb.conf.sample
index 7243e84..e586b13 100644
--- a/configs/samples/simpleusb.conf.sample
+++ b/configs/samples/simpleusb.conf.sample
@@ -49,11 +49,15 @@
                             ; no - no carrier detection at all
                             ; usb - from the COR line on the USB sound fob (Active high)
                             ; usbinvert - from the inverted COR line on the USB sound fob (Active low)
+                            ; pp - from parallel port (Active high)
+                            ; ppinvert - from the inverted parallel port (Active low)
 								
 ;ctcssfrom = usbinvert      ; no,usb,usbinvert
                             ; no - CTCSS decoding, system will be carrier squelch
                             ; usb - CTCSS decoding using input from USB sound fob (Active high)
                             ; usbinvert - from the inverted CTCSS line on the USB sound fob (Active low)
+                            ; pp - from parallel port (Active high)
+                            ; ppinvert - from the inverted parallel port (Active low)
 
 ;deemphasis = no            ; enable de-emphasis (input from discriminator)
 
diff --git a/configs/samples/usbradio.conf.sample b/configs/samples/usbradio.conf.sample
index bacc1d4..6462134 100644
--- a/configs/samples/usbradio.conf.sample
+++ b/configs/samples/usbradio.conf.sample
@@ -66,6 +66,8 @@
                             ; usbinvert - from the inverted COR line on the USB sound fob (Active low)
                             ; dsp - from RX noise using DSP techniques
                             ; vox - voice activated from RX audio
+                            ; pp - from parallel port (Active high)
+                            ; ppinvert - from the inverted parallel port (Active low)
 
 ;ctcssfrom = dsp            ; no,usb,usbinvert,dsp
                             ; no - no CTCSS decoding, system will be carrier squelch
@@ -73,6 +75,8 @@
                             ; usbinvert - from the inverted CTCSS line on the USB sound fob (Active low)
                             ; dsp - CTCSS decoding using RX audio in DSP.
                             ; rxdemod option must be set to flat for this to work.
+                            ; pp - from parallel port (Active high)
+                            ; ppinvert - from the inverted parallel port (Active low)
 
 ;rxdemod = flat             ; input type from radio: no,speaker,flat
                             ; no - RX audio input not used