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!).