The Next Generation Of Cisco Aironet 802.11NNaccess Points The Cisco Aironet 1600E 2600E 3600E Series And 1550 Series Requires The Use Of Dual-Band External Antennas To Make Them Fully Functioning Units. As These Access Points Take Greater Advantage Of The Multiple-Input Multiple-Output (Mimo) Features Supported Under The 802.11N Standard The Number Of Radio Transceivers Per Frequency Band Has Increased. Using Dual-Band Antenna Ports Allows The Access Point To Support These Added Transceivers While Maintaining A Reasonably Low Number Of Antenna Connections. Each Dual-Band Antenna Can Transmit Or Receive Wi-Fi Signals In Both The 2.4-Ghz And 5-Ghz Bands Simultaneously.