Hi All, on this hardware: http://www.sun.com/servers/x64/x2200/specs.xml would one of the following 4 ports PRI cards be ok ? http://www.voipango.com/en/ISDNInterfaces/Digium/BRI-PRI-E1-T1-J1/Digium-TE420BF-T1/E1-PRI-PCIe-HW-EC.html http://www.voipango.com/en/ISDNInterfaces/Digium/BRI-PRI-E1-T1-J1/Digium-TE407PF-T1/E1-PRI-PCI-5-0V-HW-EC.html http://www.voipango.com/en/ISDNInterfaces/Digium/BRI-PRI-E1-T1-J1/Digium-TE412PF-T1/E1-PRI-PCI-3-3V.html http://www.voipango.com/en/ISDNInterfaces/Digium/BRI-PRI-E1-T1-J1/Digium-TE420BF-T1/E1-PRI-PCIe-HW-EC.html it should handle 90 channels over 3 PRI lines (30 channels each) and have echo cancellation. Thanks and have a nice day.