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CDM Programming Cable Pinout

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nikronzo

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Usually google and forums search are the veritable fountains of information... but for the life of me, I cannot find a simple pinout schematic for the CDM mobile programming cables. I just need the pins from the RJ45 to RS232. Does anyone have it?

Thanks!
 
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nikronzo

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forgive my ignorance, but the CDM schematics are showing the RJ45 connector to the 25 pin rib connector

I was looking for the RS232 DB9 connector schematic

1657593995413.png
 
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a417

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The CDMs either need a ribless cable (which will have a RS232 converter chip in it) or a RIB to program the units. The RIBless cables are USB to RJ45, and the RIB will have a PC to RIB wire, and then a RIB to RADIO side.

You cannot wire a PC serial port directly to the radio. It does not work like that.
 
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nikronzo

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Ah well that's what the piece of info I was missing, I did not know that they couldn't be at level. I've never worked with the CDMs before.

I learned something new
 
wa8pyr

wa8pyr

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nikronzo said:
Ah well that's what the piece of info I was missing, I did not know that they couldn't be at level. I've never worked with the CDMs before.

I learned something new
Click to expand...

There are plenty of DIY options for those programming cables on the 'net, including Batlabs. Or you can buy one:

www.ebay.com

USB Programming Cable Motorola Radius Maxtrac GM300 M1225 CDM CDM1250 CM200 | eBay

CDM750, CDM1250, CDM1550, CDM1550.LS. M10, M100, M200, M300, M400, M860, M1225 etc. GM300 programming cable. GM300, GM140, GM160, GM338, GM340, GM350, GM360, GM380, GM600, GM640, GM660, GM950, GM1280 etc.
www.ebay.com

However, if you're using RSS (DOS) for any radios, the USB cable probably won't help you, and you're better off going with a RIB and cable per Batlabs. There are some cables on eBay with DB9 connectors such as the one you pictured which claim to be "100% OEM compatible" but without knowing what's in them I call BS on that claim; they may or may not have the necessary circuitry in them to handle the RS232 to TTL conversion.
 
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