The Proxy Server works with ISDN modems and will allow the modem to bond and connect at 128k as long as MLPPP is disabled. You can NOT bond the ISDN modems together to make a 384k connection. MLPPP can not be used more than once on a link unless the products being used support this option. The Proxy Server won't support the option. The only way I know of to get a MLPPP connection using all three WAN ports would be to make sure the ISDN modems will only try to connect at 64k. Then enable MLPPP for all three WAN ports.