Cisco AIR-AP1242AG-E-K9 Hardware Installation Guide - Page 20

Hardware Features Chapter 1 Overview Hardware Features This section describes access point features. Refer to Appendix C, "Access Point Specifications," for a list of access point specifications. Key hardware features of the 1200 series access point include: • Dual-Radio Operation, page 1-2 • LEDs, page 1-3 • Ethernet Port, page 1-3 • Console Port, page 1-4 • Power Sources, page 1-4 • UL 2043 Certification, page 1-4 • Anti-Theft Features, page 1-5 Dual-Radio Operation The 1200 series access point can be initially configured at the factory for single- or dual-radio operation. You can also upgrade an access point configured for single-radio operation to support dual-radio operation using a 5-GHz radio module or a 2.4-GHz mini-PCI radio card. The access point supports one radio of each type, but it does not support two 2.4-GHz or two 5-GHz radios. The 2.4-GHz mini-PCI radio card connects to an internal mini-PCI slot and is available in two configurations: • IEEE 802.11b mini-PCI radio card, hereafter called 802.11b radio • IEEE 802.11g mini-PCI radio card, herafter called 802.11g radio - Requires Cisco IOS Release 12.2(13)JA or later The 5-GHz radio module connects to the access point's modified card bus connector and is available in three configurations: • IEEE 802.11a radio module with integrated antenna (low power), hereafter called the RM20A radio module • IEEE 802.11a radio module with integrated antenna, hereafter called the RM21A radio module - Requires Cisco IOS Release 12.3(2)JA or later • IEEE 802.11a radio module with external RP-TNC antenna connectors, hereafter called the RM22A radio module - Requires Cisco IOS Release 12.3(2)JA or later All 5-GHz radio modules incorporate an Unlicensed National Information Infrastructure (UNII) radio transceiver operating in the UNII 5-GHz frequency bands. The RM20A and the RM21A radio modules contain dual integrated omnidirectional antennas and directional antennas for diversity operation. The 802.11b or 802.11g radio is called Radio0 and the 802.11a radio is called Radio1. Note Cisco Aironet CB20A client radios can sometimes fail to associate to the RM21A or RM22A radio modules because the CB20A client radio does not support all the channels supported by the radio modules. The default channel setting for the RM21A or RM22A radio module, least congested, often results in the access point settling on one of these frequencies that the CB20A client radio does not support: channel 149 (5745 GHz), channel 153 (5765 GHz), channel 157 (5785 GHz), and channel 161 Cisco Aironet 1200 Series Access Point Hardware Installation Guide 1-2 OL-4310-05