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CM200 Repeater

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Jun 17, 2014
Memphis, TN
I have two Motorola CM200's and trying to setup a repeater between both.
I have: https://www.amazon.com/Generic-gsd-...78021378&sr=8-1&keywords=pm400+repeater+cable

Can anyone please help me to know what to set within the program to get these to work? I tried setting pin 8 to PL/CSQ Talkgroup Detect with low and debounce but I do not see a Pin 2 or Pin 11. only pin3,4,6,8,9,12,14. I have the Accessory Package set to Default. Do I need to change this? I appreciate any and all help as I am new to this. Thanks

Edit: I am now able to get it to work but no audio is being carried.
Last edited:
Dec 5, 2008
Sonoma, CA
You bought a full-duplex cable. You need a simplex (repeater) cable:
Note that one end is clearly marked RX and the other end is TX.
While the cable is not for the way you intended, it can still be used. Just disable the PTT wire (pin3) to the receive radio. You can pull it out of the housing with a release tool or simply cut it. That will make the cable strictly uni-directional.

The only two programmable pins you need to concern yourself with is 3 and 8. Pin 3 should be set as "External Mic PTT", and pin 8 as "PL/CSQ/Talkgroup Detect". Both active low.

Also under accessories, Rx Audio Type needs to be set as "Filtered Audio" and External PTT Audio Source as "Ext Mic Audio"

Other than setting the level on the cable, this is all that needs to be done.
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