FireBrick Bonding more than 3 lines
A FireBrick 2x00 has 4 ports, a typically one port will be for the LAN connection, and the rest for connections to the ADSL modems. As there are 4 ports are we restricted to only bonding up to 3 ADSL/FTTC lines? no.
To overcome the physical port restriction a VLAN switch can be used, eg:
ADSL MODEM 1 - ADSL MODEM 2 - ADSL MODEM 3 - VLAN Switch -- Firebrick -- LAN ADSL MODEM 4 -