Hello Pete,

I designed a 3rd party IRLP board a few years ago, and published the designs on my web site:

http://www.qsl.net/k0kn/plri.html

I am using two of these on app_rpt with good results. The hardware DTMF decoder is not supported by app_rpt however.

I'm not sure how app_rpt would handle using one parallel port for multiple nodes though. I've not tried to define 

parallel port pins for more than one node on a server. My parallel port definitions from usbradio.conf:

; IRLP board support
pp3 = ptt ; out0, out1 or ptt
; pp10 = in ; in, cor or ctcss
; pp12 = in ; pins 10,12,13,15 are for DTMF
; pp13 = in 
; pp15 = in 
pp11 = cor
; pp4 = out0 ; pins 4,5,6 are AUX 1,2,3, default off
; pp5 = out0 
; pp6 = out0 
 
73..
 
Kyle
K0KN

--- Original Message ---

Hi All,

 

Is there a circuit board design for running COS/PTT for multiple radios
off the parallel port?   It would make using consumer FOBs much simpler.
It would need some PTT drivers and COS buffers.

 

I thought there might be a cactus board or 3rd party IRLP board that may
already in circulation. 

 

Pete