Under the SPA500 phones document within the cisco website it shows that the wallmount kit for the SPA500 series is the MB100. Upon recieving these brackets I found that when the phone is wallmounted and the handle is in the cradle it falls out...
and yes, I swear I followed the mounting instructions ...its not upside down.
The documentation out of packaging shows the phone for the SPA900 series. Is this the wrong part?