Re-enabled uuid_display found the real problem to the dtmf detection lag was caused by uuid_display with an incorrect rtp packet size (aka ptime) set wrong on the SPA504g. It was set to 0.030 but needs to be set to 0.020.

git-svn-id: http://fusionpbx.googlecode.com/svn/trunk@4360 e2954ef0-caed-11de-bd98-e341d93cc3cc