Hey, sorry to drag up an old topic, but I wanted to put this here since it’s on the front page of google when searching how to apply the cisco-usecallmanager patch to freepbx.
There is a new version of this patch which applies to asterisk 13.10.0, which is the version of asterisk used by the newest FreePBX - 10.13.66-15. So since we have Cisco 7900 phones, I wanted to get the cutting-edge FreePBX working with them. After several hours and much ado I have something to show for it, and here it is:
https://drive.google.com/drive/folders/0B211QsfoNBOPVHd1TlRhX2lycnM
Here I have the shmz6 version of asterisk 13.10.0-1.shmz6.x86_64 patched with the cisco-usecallmanager-13.10.0 patch:
https://issues.asterisk.org/jira/browse/ASTERISK-13145
I have provided both an SRPM and an RPM and my notes of what was done to produce them.
To install it:
Make sure you are running version 10.13.66-15 of FreePBX:
http://wiki.freepbx.org/display/PPS/FreePBX-Distro-10.13.66
Then download my asterisk13-core RPM and then simply:
fwconsole stop
rpm -Fvh --nodeps asterisk13-core-13.10.0-2.shmz6.x86_64.rpm --force
fwconsole start
I hope this helps someone! 
PS: Sorry for the links not being links, I signed up just so I could post this, and it won’t let me post links because I am a new user, so you’ll have to copy/paste.
Edit by @xrobau: Fixed the links so they’re clickable. Thanks!