Channels and Maximum Power Settings for Cisco Aironet Lightweight Access Points, OL-11321-07
Cisco Aironet 1300 Series Access Point/Bridge
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Cisco Aironet 1300 Series Access Points

Table Of Contents

Cisco Aironet 1300 Series Access Points

Channels

IEEE 802.11g (2.4-GHz Band)

Maximum Power Levels and Antenna Gains

IEEE 802.11b/g (2.4-GHz Band)

Changing the Lightweight Access Point Output Power

Power Conversion Table


Cisco Aironet 1300 Series Access Points


This chapter lists the lightweight access point (model: AIR-LAP1310G) IEEE 802.11b/g 2.4-GHz channels, maximum power levels, and antenna gains supported by the world's regulatory domains. For additional product hardware information refer to the Cisco Aironet 1300 Series Outdoor Access Point/Bridge Hardware Installation Guide.

The following topics are covered in this chapter:

Channels

Maximum Power Levels and Antenna Gains

Changing the Lightweight Access Point Output Power

Power Conversion Table

Channels

IEEE 802.11g (2.4-GHz Band)

The channel identifiers, channel center frequencies, and regulatory domains of each IEEE 802.11b/g 22-MHz-wide channel are shown in Table 8-1.

Table 8-1 Channels for IEEE 802.11b/g

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

-

-

-

-

-

-



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.


Maximum Power Levels and Antenna Gains

IEEE 802.11b/g (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 8-2 indicates the IEEE 802.11b/g maximum power levels and antenna gains allowed for each regulatory domain.


Note To meet regulatory restrictions, the external antenna access point/bridge 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 installation, access to the unit should be password-protected by the network administrator to maintain regulatory compliance.


Table 8-2 Maximum Power Levels Per Antenna Gain for IEEE 802.11b/g 

Regulatory Domain
Antenna Gain (dBi)
Maximum Power Level (mW)
CCK
OFDM

Americas (-A)
(4 W EIRP maximum)

2.2 (Omni)

100

30

5.2 (Omni)

100

30

9 (Patch)

100

30

10 (Yagi)

100

30

EMEA (-E)
(100 mW EIRP maximum)

2.2 (Omni)

50

30

5.2 (Omni)

20

20

9 (Patch)

10

10

10 (Yagi)

10

10

Japan (-J)
(10 mW/MHz EIRP maximum)

2.2 (Omni)

10

10

5.2 (Omni)

10

10

9 (Patch)

10

10

10 (Yagi)

10

10


Changing the Lightweight Access Point Output Power

This section provides instructions for changing the 1300 series lightweight access point output power to comply with the maximum power limits imposed by regulatory domains (see the "Maximum Power Levels and Antenna Gains" section). Follow these instructions to change the output power settings using your browser:


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



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


The output power on the AIR-LAP1310G-x-K9 (where x is the regulatory domain) access points can be changed only by using a Cisco wireless LAN controller (2600 series or 4400 series), the controllers on a Cisco Wireless Services Module (WiSM), or using Cisco Wireless Control System (WCS).


Note See the Cisco Wireless LAN Controller Configuration Guide for more details on how to configure your access point using the web-browser interface.


Follow these steps to change the AIR-LAP1310G-x-K9 (where x is the regulatory domain) access point's output power to meet local regulations using a controller:


Step 1 Open your Internet browser. You must use Microsoft Internet Explorer 6.0.2800 or a later release.

Step 2 Enter https://IP address (where IP address is the controller's IP address) in the browser address line and press Enter. A user login screen appears.

Step 3 Enter the username and password and press Enter. The controller's summary page appears.


Note The username and password are case-sensitive.


Step 4 Click Wireless > 802.11b/g Radio and a list of associated access points appears.

Step 5 Choose the desired access point from the displayed list and click Configure. The radio settings page appears.

Step 6 Scroll down to the Tx Power Level Assignment field, and click Custom. Custom indicates that the radio output power is manually controlled by the Tx Power Configuration setting field.

Step 7 In the Tx Power Level field, select the appropriate power level setting (1 to 8).

Based on the configured antenna gain, the configured channel, and the configured power level, the actual transmit power at the access point can be reduced so that the specific country regulations are not exceeded.

Table 8-3 lists the controller power settings and the corresponding output power levels for this example:

2.4-GHz (802.11b/g) operation:

EMEA (-E) regulatory domain and channel 2

5.2-dBi external antenna

Table 8-3 Available Output Power Levels

Controller
Tx Power Settings 1
Radio Output Power
802.11b (mW)
802.11g (mW)

1 (maximum)2

50

30

2

25

15

3

12

8

4

6

4

5

3

2

6

2

1

7

-1

-

8

 

-

1 The Tx Power Level setting of 1 represents the maximum conducted power setting for the access point. Each subsequent power level (such as 2, 3, 4, etc.) represents an approximate 3-dBm reduction in transmit power from the previous power level.

2 See Table 8-2 for the maximum power levels in the -E regulatory domain.


The manual controller Tx Power Level setting is 3 for 802.11b (CCK) data rates (see Table 8-2).

The manual controller Tx Power Level setting is 2 for only 802.11g (OFDM) data rates (see Table 8-2).

Step 8 Click Apply.

Step 9 Close your Internet browser.

For additional configuration information, refer to the Cisco Wireless LAN Controller Configuration Guide.


Power Conversion Table

You can use Table 8-4 to convert power values from dBm to mW or from mW to dBm.

Table 8-4 Power Conversion Table

mW
dBm
 
mW
dBm
 
mW
dBm

200

23

 

40

16

 

8

9

150

22

 

30

15

 

6

8

125

21

 

25

14

 

5

7

100

20

 

20

13

 

4

6

80

19

 

15

12

 

3

5

60

18

 

12

11

 

2

2

50

17

 

10

10

 

1

-1