I have setup Asterisk to work with a SIP gateway, some SIP phones and the Digium FXS/FXO development card combo on another * box with pretty good results so far. Here are a couple of questions that I have that wasn't obvious from the documentation: Voicemail vs Voicemail2 - What is the major difference between these and does Voicemail2 use different parameters or config file options? Voicemail was the only one I found documented. IAX vs IAX2 - See documentation of IAX and have it working but I see a few examples floating around using IAX2. Are there any different parameters or config file options between the two? I read that IAX2 has a more efficient payload mechanism but what else can anyone tell me. Thanks for the help!