I am evaluating the best way to make a high avail and load balanced system. I have two identical asterisk servers. Most clients are SIP phones. The only special hardware I have on both systems (they are identical) is: 1 E1 PRI card and 1 4-port BRI card. I have 8 ISDN lines so 4 go to each pbx server. I have 2 PRI lines that connect to an Alcatel PBX so each asterisk pbx has 1 PRI connection (routed the same way of course). I need to implement an active-active cluster of 2 servers. I'm new to Heartbeat and I've read this: http://www.ultramonkey.org/3/topologies/ha-lb-eg.html Could I setup Asterisk with this topology? Would I just need to have 2 identical servers? Would "call routing/SIP registrations/internal astdb" be handled correctly (ie. as if it were a single server)? Thanks for your input. ____________________________________________________________________________________ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs