am trying to set up a VOIP system (bandwidth.com) and get it to work behind our MS Small Business Server with ISA. The hardware configuration would be as follows Internet > T1 line > EdgeMarc 4300T Appliance > MS Small Business Server with ISA > PC's & Cisco 7960G IP Phones The system uses the MGCP Protocol. I'm told for the system to work, I need to open up the following Ports. Port Type Firewall Ports to Open UDP 161(SNMP) and 162 (SNMPTRAP) RTP 1056 to 1255 TCP SSH TCP 22 for remote management & TCP 80 for WAN configuration-downloads Telnet 23 FTP TCP 21 for state-full TCP-session control from 4300T to Edgewater FTP server MGCP 2427, 2429, 2432, and 2727 NTP 123 SIP 5060 and 5075 Thanks in advance,