I'm the IT guy for a medium sized non-profit organization. I would like to replace our current Cisco 831 router with a pfSense Box(an open-source BSD hardware firewall) to provide a few upgrades to our current network(such as dual wan, traffic monitoring, gigabit LAN, Web Based Configuration and a captive portal.) We have a Mitel SX-200 ICP, NSU, ASU and about 100 5215 IP Phones. The phones serve as a switch for the computers(i.e. line to phone, phone to computer), both receiving IP's from the Cisco Router on the same subnet. The phone's Network Configuration show "VLAN: None". My question is what specific DHCP Options need to be added to the DHCP Server in order for the phones to work? As it stands now I have Option 128(SX-200 IP Address), Option 129(SX-200 IP Address), Option 130(MITEL IP PHONE). I can unplug the Cisco 831 and plug in the new router box and everything continues to work, however, if I reboot the phones they aren't able to come back up, saying "L2&Boot Download Error". Any ideas?