Cisco makes wireless access points for many countries. So if you're purchasing equipment for offices in different parts of the world, you should make sure that it meets regulations in the country where you'll be using it.
It's particularly important to check the part number if you're purchasing used or refurbished equipment. You don't want to be stuck with used equipment taken from some other country that doesn't meet regulations for your locale.
Generally, the digit before "K" near the end of the Aironet part number indicates what regulatory body the access point was manufactured for.
Here's a sampling of some of the codes:
A - FCC (U.S.)
C - China
E - ETSI (Europe)
I - Israel
K - Korea
S - Singapore
T - Taiwan
For example, a part number AIR-AP1131AG-A-K9 means that the equipment meets American (FCC) regulations, whereas AIR-AP1131AG-E-K9 means that it meets European (ETSI) regulations.
However, sometimes determining which part numbers are appropriate for each country can be a little more complicated. For example, a country may follow European regulations even if it isn't in Europe. Also, Mexico basically follows FCC regulations, but for some products doesn't support additional channels, in which cases it uses "N" instead of "A."
In addition, various countries may have further requirements and may not allow certain models even if the letter before "K" matches. Typically, models with "AG" work are allowed in more places.
To verify if an Aironet model is designed to meet a country's regulations, go to the following website: