Batboard

Hi.

Could the Front case from a Maxtrac be swithed by I Front case from a GM300 ? It will be compatible?

I believe the front case of the Maxtrac & the GM300 are structurally the same inside, so they would be compatible in that respect. I think the pinout of the volume & channel/system board in the front head is the same as well, so long as we're talking a Maxtrac with the 7-segment display. Obviously the labeling would be different, but functionally, it should work. I would double check the impedance of the speakers, and make sure they are the same, or simply swap them if there is a difference.

Beyond that, I think you should be fine.

NO.
Not exactly the same.
As I said on the other discussion board, the older RADIUS and MAXTRAC have a 12 pin and a 13 pin connector.
The GM300 line have a 12 pin and a 15 pin connector.
So NOT directly interchangeable.
The display board has the 12 pin, and those are essentially the same.
The 15 pin (GM Series) is not even close to the same pinouts as the 13 pin of the MAXTRAC.
The primary reason for the difference is the speaker wires are added to the MIC/HANDSET/PROGRAMMING board.
If you get down to actual specifics, there are almost NO parts that are the exact same on the GM as the ones on the RADIUS and MAXTRAC.
Really other than the top and bottom covers, and the screws, nearly everything else is different.