CMM vs. CMMmicro

What advantages are there using the CMM over the CMM-mirco. I have both in service and had a few problems with the CMM it tends to lock up and give an antenna short connection detected on the GPS display. Fine after a pwr recycle. Any input here or opinions would be great! :lol:

If you have very old APs (ones with black plastic RJ connectors not the metal sheilded ones), then you can’t use the CMM mciro.