C I S C O C O N F I D E N T I A L - D r a f t A 1
1-5
Cisco Aironet 1250 Series Access Point Hardware Installation Guide
OL-8247-02
Chapter 1 Overview
Hardware Features
Radio Module Slots
The access point has two radio module slots: Slot 0 and Slot 1 (see
). The radio modules can
be initially placed in any slot before the radios are configured with non-default parameters. New radio
configuration changes are associated with the specific module slot in which the radio module is located.
When the default radio settings are changed, the radio modules should not be moved to a different slot.
After configuration changes are made, moving the radio modules to a different modules slot requires that
you re-configuring the radio settings for that slot.
Single or Dual-Radio Operation
The access point supports single or simultaneous dual radio
( draft IEEE 802.11n version 2.0)
operation
using 2.4-GHz and 5-GHz radio modules. Each radio module contains an integrated
radio with three
antenna connectors. A blank module is supported for single radio access point configurations.
Note
The draft IEEE 802.11n version 2.0 radio modules support field upgrading to full 802.11n support when
the standard is finalized.
The
2.4-GHz radio supports 802.11b, 802.11g, and 802.11n modes of operation. The 2.4-GHz radio also
supports 1 or 2 transmitting antennas and up to 3 receiving antennas.
The 5-GHz radio supports 802.11a and 802.11n modes of operation. The radio supports the Unlicensed
National Information Infrastructure (UNII-1, UNII-2, and UNII-3), and the European
Telecommunications Standards Institute
/
industrial, scientific and medical (ETSI/ISM) frequency bands.
The 5-GHz radio also supports 1 or 2 transmitting antennas and up to 3 receiving antennas.
Operating Modes
The 2.4 GHz radio module supports
six
operating modes:
•
802.11b single transmit antenna
•
802.11g single transmit antenna
•
802.11g dual transmit antennas
•
802.11g dual transmit antennas with beam forming??
•
802.11n HT-20 MHz with dual transmit antennas
•
802.11n HT-40 MHz with dual transmit antennas
The 5 GHz radio module supports
six
operating modes:
•
802.11a single transmit antenna
•
802.11a dual transmit antennas
•
802.11a dual transmit antennas with beam forming??
•
802.11n HT-20 MHz with dual transmit antennas
•
802.11n duplicate (2x20) HT-20 MHz with dual transmit antennas
•
802.11n HT-40 MHz with dual transmit antennas