El Salvador falls under regulatory the domain for America ("A"). The access-point you are referring to is kinda the "old" model and autonomous (so no controller involved). I would recommend going for the 2700 because the pricing is the same as the 2600, but with the 2700 you get 802.11ac as well. In this case your model is gonna be AIR-SAP2702I-A-K9.
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