AP's (or AP clusters) and BH Masters may experience intermittent sync problems when upgrading from a CMM2 to a CMM Micro.
If you leave the cable in the RJ-12 connector of the radio when using the a CMM Micro then you need to place an 8K resistor between pins 5 and 6 of the old sync cable. Without this resistor you will see an impedance mismatch, which will cause intermittent sync problems.