HI I am running asterisk 1.4.18 on both machines. I have two asterisk machines setup and a polycom phone, the main machine is #1 the polycom phone is connected to it as the server. I come offhook on the polycom, dial 21, which calls machine #2. Machine #2 is only to play demo-congrats. Watching the asterisk monitor on both machines I see on #1 the Dial going to machine #2, machine #2 shows executing playback(demo-congrats). However, I hear no audio. I have done "service iptables stop" on both machines. Both machines have in their sip.conf entry disallow=all allow=ulaw allow=alaw Everything "appears" to be working - just not hearing audio. Why else would I not hear audio? When I run the polycom and call into the dialplay on machine #1 I hear audio just fine. Jerry