① natural cooling with no mechanical failure, high reliability, is conducive to heat, no noise and so on.
② pure fan cooling equipment with light weight, low cost.
③ fan and the combination of natural cooling technology to reduce the size and weight of equipment, high service life, fan failure adaptive ability.
Natural cooling: This approach is mainly rely on a large metal radiator to conduct direct heat conduction cooling.
Disadvantages: the disadvantage of this approach is the heat sink size and weight.
Advantages: its cleanliness of the environment less demanding, the current communication power for small capacity.