Users report that, with Asterisk 11 and FreePBX 2.11 running PIAF-Green, Google works for a while and then stops. The likely suspect is a keep-alive problem in the Asterisk 11 xmpp module. @tm1000 released the following patch to address the issue. Log into your server as root, download and untar the patch, and then run the script to update Asterisk 11 (only!).