Cisco AIR-AP1252AG-E-K9 Hardware Installation Guide - Page 144
IEEE 802.11a (5-GHz Band), Table D-7, Maximum Power Per Antenna Gain for the RM20A Radio Module
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Maximum Power Levels and Antenna Gains Appendix D Channels and Antenna Settings IEEE 802.11a (5-GHz Band) An improper combination of power level and antenna gain can result in equivalent isotropic radiated power (EIRP) above the amount allowed per regulatory domain. Table D-7 indicates the maximum power levels allowed with RM20A radio module for each IEEE 802.11a regulatory domain. Table D-7 Maximum Power Per Antenna Gain for the RM20A Radio Module Regulatory Domain Americas (-A) (160 mW EIRP maximum on channels 36-48, (800 mW EIRP maximum on channels 52-64) Japan (-J) (10 mW/MHz EIRP maximum) Singapore (-S) (100 mW EIRP maximum) Taiwan (-T) (800 mW EIRP maximum) Maximum Power Level (mW) with 6-dBi Antenna Gain 40 40 20 40 Note The maximum power level for Chile is 20 mW. When operating in Chile, you must ensure that your access point Transmitter Power setting never exceeds 20 mW. Cisco Aironet 1200 Series Access Point Hardware Installation Guide D-8 OL-4310-05