Moto CDM 1250 and Rugged radio intercom

[mkm43057]

Greetings all,

I apologize in advance if this has already been a discussed topic, but I tried to search for this subject and was UTL any other forums.

Anyways, I have a Moto CDM 1250 with the proper 16 pin connecting wire between the CDM and a Rugged Radio RRP 696 intercom. Intercom has PTT buttons that connect straight to the intercom control head and not the headset itself.

ISSUE: When I try to transmit through the intercom headset and through the CDM on a repeated channel, there’s no transmission. The repeater is a home brew CDM repeater. I can see the rx radio receive the transmission, but the LED on the tx radio does not light up. There isn’t even audio on a separate radio.

Continuing, when I switch over to a direct/simplex channel...like MURS, I can transmit through the headset and hear the voice audio on a separate radio. And no the MURS is not the repeater frequency.

When I transmit with the normal hand mic I can transmit through the repeater just fine.

My thought is that I’m missing something in the CPS and I’m hoping someone can point me in the right direction.

 

[Project25_MASTR]

Call rugged and ask them whether PTT needs to be active high or active low to work with the intercom.

 

[mkm43057]

Call rugged and ask them whether PTT needs to be active high or active low to work with the intercom.

when you talk about active high or low, are you talking about the pin assignment and has a pull down menu to the right that says high or low?

 

[mmckenna]

My thought is that I’m missing something in the CPS and I’m hoping someone can point me in the right direction.

Yeah. I don't have CPS here on this computer, but that is ringing a bell. I know you can set up the rear pins to transmit without a PL/DPL tone for some uses. Sounds like a programming error.

 

[mkm43057]

I will give that a try. Thanks for the info!

 

[jeepsandradios]

Make sure its not set for Data PTT. That sends with no PL. Pin 3 should be External Mic PTT and not Data PTT.

 

[mmckenna]

Make sure its not set for Data PTT. That sends with no PL. Pin 3 should be External Mic PTT and not Data PTT. View attachment 100124

Thanks Dude, that's what I was thinking of.