Delay lines, mixers, feedback, transmitters, PSTN........ http://www.max-neuhaus.info/radionet.htm http://www.max-neuhaus.info/audio-video/audio-video.htm# -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida JLeikhim at Leikhim.com 407-982-0446 WWW.LEIKHIM.COM