Table Of Contents

Cisco Aironet 1100 Series Access Points

Channels

AIR-AP1120B IEEE 802.11b (2.4-GHz Band)

AIR-AP1121G IEEE 802.11g (2.4-GHz Band)

Maximum Power Levels

AIR-AP1120B IEEE 802.11b (2.4-GHz Band)

AIR-1121G IEEE 802.11g (2.4-GHz Band)

Changing Access Point Output Power

Cisco Aironet 1100 Series Access Points

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This chapter lists the 1100 series autonomous (AIR-AP1120B or AIR-AP1121G) access point
IEEE 802.11b (2.4-GHz) and IEEE 802.11g (2.4-GHz) channels and the maximum power levels supported by the world's regulatory domains. For additional product hardware information refer to the Cisco Aironet 1100 Series Access Point Hardware Installation Guide.

The following topics are covered in this chapter:

•Channels

•Maximum Power Levels

•Changing Access Point Output Power

Channels

AIR-AP1120B IEEE 802.11b (2.4-GHz Band)

The channel identifiers, channel center frequencies, and regulatory domains of each IEEE 802.11b 22-MHz-wide channel are shown in Table 1-1.

Table 1-1 Channels for IEEE 802.11b

Channel Identifier	Center Frequency (MHz)	Regulatory Domains
		Americas (-A)	EMEA (-E)	Israel (-I)	Japan (-J)
1	2412	X	X	-	X
2	2417	X	X	-	X
3	2422	X	X	-	X
4	2427	X	X	-	X
5	2432	X	X	X	X
6	2437	X	X	X	X
7	2442	X	X	X	X
8	2447	X	X	X	X
9	2452	X	X	-	X
10	2457	X	X	-	X
11	2462	X	X	-	X
12	2467	-	X	-	X
13	2472	-	X	-	X
14	2484	-	-	-	X

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Note Mexico is included in the Americas (-A) regulatory domain; however, channels 1 through 8 are for indoor use only while channels 9 through 11 can be used indoors and outdoors. Users are responsible for ensuring that the channel set configuration is in compliance with the regulatory standards of Mexico.

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AIR-AP1121G IEEE 802.11g (2.4-GHz Band)

The channel identifiers, channel center frequencies, and regulatory domains of each IEEE 802.11g 22-MHz-wide channel are shown in Table 1-2.

Table 1-2 Channels for IEEE 802.11g

Channel Identifier	Center Frequency (MHz)	Regulatory Domains
		Americas (-A)		EMEA (-E)		Japan (-J)
		CCK	OFDM	CCK	OFDM	CCK	OFDM
1	2412	X	X	X	X	X	X
2	2417	X	X	X	X	X	X
3	2422	X	X	X	X	X	X
4	2427	X	X	X	X	X	X
5	2432	X	X	X	X	X	X
6	2437	X	X	X	X	X	X
7	2442	X	X	X	X	X	X
8	2447	X	X	X	X	X	X
9	2452	X	X	X	X	X	X
10	2457	X	X	X	X	X	X
11	2462	X	X	X	X	X	X
12	2467	-	-	X	X	X	X
13	2472	-	-	X	X	X	X
14	2484	-	-	-	-	X	-

Maximum Power Levels

AIR-AP1120B IEEE 802.11b (2.4-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 1-3 indicates the maximum power levels allowed with the Cisco integrated antenna for each IEEE 802.11b regulatory domain.

Table 1-3 Maximum Power Levels Per Antenna Gain for IEEE 802.11b 

Regulatory Domain	Antenna Gain (dBi)	Maximum Power Level (mW)
Americas (-A) (4 watts EIRP maximum)	2.2	100
EMEA (-E) (100 mW EIRP maximum)	2.2	50
Israel (-I) (100 mW EIRP maximum)	2.2	50
Japan (-J) (10 mW/MHz EIRP maximum)	2.2	30

AIR-1121G IEEE 802.11g (2.4-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 1-4 shows the maximum power levels allowed with the Cisco integrated antenna for each IEEE 802.11g regulatory domain.

Table 1-4 Maximum Power Levels Per Antenna Gain for IEEE 802.11g 

Regulatory Domain	Antenna Gain (dBi)	Maximum Power Level (mW)
		CCK	OFDM
Americas (-A) (4 watts EIRP maximum)	2.2	100	30
EMEA (-E) (100 mW EIRP maximum)	2.2	50	30
Japan (-J) (10 mW/MHz EIRP maximum)	2.2	30	30

Changing Access Point Output Power

This section provides instructions for changing the 1100 series autonomous access point output power to comply with the maximum power limits imposed by regulatory restrictions.

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Note Administrator privileges may be required in order to change access point settings.

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Note Regulatory domains are set at the factory and cannot be changed by the user.

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Note Regulatory domains are set at the factory and cannot be changed by the user.

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Caution To meet regulatory restrictions, the access point and the external antenna must be professionally installed. The network administration or other IT professional responsible for installing and configuring the unit is a suitable professional installer. Following configuration, access to the unit should be password protected by the network administrator to maintain regulatory compliance.

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To change the access point output power level, follow these instructions:

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Step 1 Use your web-browser to access your access point.

Step 2 When the Summary Status page displays, click Radio0-802.11B or Radio0-802.11G and the radio status page appears.

Step 3 Click Settings and the radio settings page appears.

Step 4 For the 802.11B or 802.11G radio, follow these steps:

a. Scroll down to the CCK Transmit Power (dBm) settings and click the desired output power level.

b. For the OFDM Transmit Power (dBm) settings, click the desired output power level.

Step 5 Scroll down to the bottom of the page and click Apply.

Step 6 Close your web-browser.

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