Are slower Internet connections (ISDN, 56k, carrier pigeons) supported in ArmA online?
Answer by Suma (Developer): I would even say ArmA bandwidth requirements are lower than OFP, thanks to numerous optimizations, but as already said, it really depends on the mission, and with more players and more complex missions the bandwidth requirements will be higher. While developing Xbox version, we estimated around 32kbps per player is needed on the server in a moderately complex mission, including voice over net. Your hosting options will therefore be quite limited, but you should be able to play at least some missions. That said, I do not have any solid numbers from ArmA net testing yet, therefore the above is only estimation and it is by no means guaranteed.