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Radio Module Slots, Single or Dual-Radio Operation, Operating Modes, Spatial Multiplexing - specifications

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Chapter 1 Overview Hardware Features Radio Module Slots The access point has two radio module slots: Slot 0 and Slot 1 (see Figure 1-1). Slot 0 can only be used with the 2.4-GHz radio module and slot 1 can only be used with the 5-GHz radio module. 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. 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 four operating modes: • 802.11b single transmit antenna • 802.11g single transmit antenna • 802.11n HT-20 MHz with dual transmit antennas • 802.11n HT-40 MHz with dual transmit antennas The 5-GHz radio module supports three operating modes: • 802.11a single transmit antenna • 802.11n HT-20 MHz with dual transmit antennas • 802.11n HT-40 MHz with dual transmit antennas Spatial Multiplexing The radio modules can support two transmitters to achieve faster data rates for a given bandwidth. This technique is called multiple input multiple output (MIMO) and relies on the premise that, via multi-path, two transmitted signals take different paths to the receivers. Using special data packet features allows the receivers to distinguish between the two transmitted signals and increases the access point data rate. OL-8247-03 Cisco Aironet 1250 Series Access Point Hardware Installation Guide 1-5

Section	Page
Cisco Aironet 1250 Series Access Point Hardware Installation Guide	1
Contents	3
Preface	9
Audience	9
Purpose	9
Organization	9
Conventions	10
Related Publications	12
Locating the Product Serial Number	13
Obtaining Documentation, Obtaining Support, and Security Guidelines	14
Overview	15
Product Terminology	15
Autonomous Access Points	15
Lightweight Access Points	16
Guidelines for Using Cisco Aironet Lightweight Access Points	16
Hardware Features	17
Radio Module Slots	19
Single or Dual-Radio Operation	19
Operating Modes	19
Spatial Multiplexing	19
Maximum Ratio Combining	20
Antennas Supported	20
LEDs	21
Ethernet Port	21
Console Port	22
Power Sources	22
UL 2043 Compliance	22
Anti-Theft Features	23
Network Examples with Autonomous Access Points	24
Root Unit on a Wired LAN	24
Repeater Unit that Extends Wireless Range	25
Central Unit in an All-Wireless Network	26
Workgroup Bridge Network	26
Network Example with Lightweight Access Points	27
Installing the Access Point	29
Safety Information	30
FCC Safety Compliance Statement	30
General Safety Guidelines	30
Warnings	30
Unpacking the Access Point	31
Package Contents	31
Basic Installation Guidelines	32
Before Beginning the Installation	32
Access Point Bottom Connector Access Openings	32
Installation Summary	33
Mounting Overview	33
Mounting on a Horizontal or Vertical Surface	35
Mounting Below a Suspended Ceiling	37
Mounting Above a Suspended Ceiling	39
Installing Option One	41
Installing Option Two	43
Installing Option Three	44
Mounting to a Network Cable Box	46
Mounting on a Desktop or Shelf	47
Connecting the Ethernet and Power Cables	48
Connecting to an Ethernet Network with an Inline Power Source	49
Connecting to an Ethernet Network with Local Power	50
Powering Up the Access Point	50
Installing or Removing the Mounting Plate Latch	51
Installing the Mounting Plate Latch	51
Removing the Mounting Plate Latch	51
Installing the Access Point to the Mounting Plate	52
Mounting Plate Not Attached to a Surface	52
Mounting Plate Attached to a Surface	54
Securing the Access Point	55
Securing the Access Point to the Mounting Plate	55
Using a Security Cable to Secure the Access Point	57
Removing the Access Point From the Mounting Plate	58
Removing a Radio Module	60
Inserting a Radio Module	62
Troubleshooting 1250 Series Autonomous Access Points	65
Checking the Autonomous Access Point LEDs	66
Checking the Power Injector LEDs	68
Checking Basic Settings	69
Default IP Address Behavior	69
Enabling the Radio Interfaces	69
SSID	70
WEP Keys	70
Security Settings	70
Low Power Condition on Autonomous Access Points	71
Intelligent Power Management	71
Inline Power Status Messages	72
Configuring Power Using the CLI	75
Issuing the Cisco IOS Command Using the CLI	77
Configuring the Access Point System Power Settings Using a Browser	77
Running the Carrier Busy Test	80
Running the Ping Test	81
Resetting to the Default Configuration	82
Using the MODE Button	82
Using the Web Browser Interface	83
Reloading the Access Point Image	83
Using the MODE Button	83
Web Browser Interface	84
Browser HTTP Interface	84
Browser TFTP Interface	85
Obtaining the Access Point Image File	86
Connecting to the Access Point Locally	86
Obtaining the TFTP Server Software	88
Troubleshooting 1250 Series Lightweight Access Points	89
Guidelines for Using Cisco Aironet Lightweight Access Points	90
Using DHCP Option 43	90
Checking the Lightweight Access Point LEDs	91
Checking the Power Injector LEDs	94
Low Power Condition for Lightweight Access Points	95
Intelligent Power Management	95
Inline Power Status Messages	96
Configuring Power Using Controller CLI Commands	99
Manually Configuring Controller Information Using the Access Point CLI	100
Configuring Controller Information	101
Clearing Manually Entered Controller Information	101
Manually Resetting the Access Point to Defaults	101
MODE Button Setting	101
Connecting to the Access Point Locally	102
Obtaining the TFTP Server Software	103
Translated Safety Warnings	105
Declarations of Conformity and Regulatory Information	107
Manufacturers Federal Communication Commission Declaration of Conformity Statement	108
VCCI Statement for Japan	109
Industry Canada	109
Canadian Compliance Statement	109
European Community, Switzerland, Norway, Iceland, and Liechtenstein	110
Declaration of Conformity with Regard to the R&TTE Directive 1999/5/EC	111
Declaration of Conformity for RF Exposure	113
Guidelines for Operating Cisco Aironet Access Points in Japan	114
Japanese Translation	114
English Translation	114
Administrative Rules for Cisco Aironet Access Points in Taiwan	115
Access Points with IEEE 802.11a Radios	115
Chinese Translation	115
English Translation	115
All Access Points	116
Chinese Translation	116
English Translation	116
Chinese Translation	117
English Translation	117
Operation of Cisco Aironet Access Points in Brazil	118
Access Point Models	118
Regulatory Information	118
Portuguese Translation	118
English Translation	118
Declaration of Conformity Statements	119
Declaration of Conformity Statements for European Union Countries	119
Access Point Specifications	121
Channels and Power Levels	125
Console Cable Pinouts	127
Overview	128
Console Port Signals and Pinouts	128
Configuring DHCP Option 43 for Lightweight Access Points	129
Overview	130
Configuring Option 43 for 1000 and 1500 Series Access Points	131
Configuring Option 43 for 1100, 1130, 1200, 1240, 1250, 1300, and 1520 Series Lightweight Access Points	132
Glossary	133

Match case Limit results 1 per page

1-5

Cisco Aironet 1250 Series Access Point Hardware Installation Guide

OL-8247-03

Chapter 1

Overview

Hardware Features

Radio Module Slots

The access point has two radio module slots: Slot 0 and Slot 1 (see

Figure 1-1

). Slot 0 can only be used

with the 2.4-GHz radio module and slot 1 can only be used with the 5-GHz radio module.

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.

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 four operating modes:

•

802.11b single transmit antenna

•

802.11g single transmit antenna

•

802.11n HT-20 MHz with dual transmit antennas

•

802.11n HT-40 MHz with dual transmit antennas

The 5-GHz radio module supports three operating modes:

•

802.11a single transmit antenna

•

802.11n HT-20 MHz with dual transmit antennas

•

802.11n HT-40 MHz with dual transmit antennas

Spatial Multiplexing

The radio modules can support two transmitters to achieve faster data rates for a given bandwidth. This

technique is called multiple input multiple output (MIMO) and relies on the premise that, via multi-path,

two transmitted signals take different paths to the receivers. Using special data packet features allows

the receivers to distinguish between the two transmitted signals and increases the access point data rate.