Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide, Release 2.5
Appendix D - Channels, Power Levels, and Antenna Gains
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Channels, Power Levels, and Antenna Gains

Table Of Contents

Channels, Power Levels, and Antenna Gains

Channels

IEEE 802.11a

IEEE 802.11b/g

Maximum Power Levels and Antenna Gains

IEEE 802.11a

IEEE 802.11b

IEEE 802.11g


Channels, Power Levels, and Antenna Gains


This appendix lists the IEEE 802.11a, b, and g channels supported by the world's regulatory domains as well as the maximum power levels and antenna gains allowed per data rate.

The following topics are covered in this appendix:

Channels

Maximum Power Levels and Antenna Gains

Channels

IEEE 802.11a

The channel identifiers, channel center frequencies, and regulatory domains of each IEEE 802.11a 20-MHz-wide channel are shown in Table D-1.

Table D-1 Channels for IEEE 802.11a

Channel Identifier
Frequency
(in MHz)
Regulatory Domains

America (-A)

EMEA (-E)

Japan (-J)

Japan (-P)
Rest of World (-W)

34

5170

X

X

36

5180

X

X

X

X

38

5190

X

X

40

5200

X

X

X

X

42

5210

X

X

44

5220

X

X

X

X

46

5230

X

X

48

5240

X

X

X

X

52

5260

X

X

X

X

56

5280

X

X

X

X

60

5300

X

X

X

X

64

5320

X

X

X

X

100

5500

X

X

104

5520

X

X

108

5540

X

X

112

5560

X

X

116

5580

X

X

120

5600

X

X

124

5620

X

X

128

5640

X

X

132

5660

X

X

136

5680

X

X

140

5700

X

X

149

5745

X

X

153

5765

X

X

157

5785

X

X

161

5805

X

X


Note All channel sets are restricted to indoor usage except America (-A), which allows for indoor and outdoor use on channels 52 through 161 in the United States.



Note The Japan (-J) channels apply only to AIR-CB21AG-J-K9 and AIR-PI21AG-J-K9 client adapters, and the Japan (-P) channels apply only to AIR-CB21AG-P-K9 and AIR-PI21AG-P-K9 client adapters.


IEEE 802.11b/g

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

Table D-2 Channels for IEEE 802.11b/g

Channel Identifier
Frequency
(in MHz)
Regulatory Domains

America (-A)

EMEA (-E)

Japan (-J)
Rest of World (-W)

1

2412

X

X

X

X

2

2417

X

X

X

X

3

2422

X

X

X

X

4

2427

X

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

X

10

2457

X

X

X

X

11

2462

X

X

X

X

12

2467

-

X

X

X

13

2472

-

X

X

X

14

2484

-

-

X

-


Note Mexico is included in the Rest of World 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.



Note In Japan, channel 14 is not supported for 802.11g mode.


Maximum Power Levels and Antenna Gains

IEEE 802.11a

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 D-3 indicates the maximum EIRP supported for all regulatory domains for each 5 GHz IEEE 802.11a data rate.

Table D-3 Maximum EIRP for IEEE 802.11a

Data Rate
Maximum EIRP for PC-Cardbus Card with 0-dBi Antenna Gain and PCI Card with 1-dBi Antenna Gain
mW
dBm

6 Mbps

40

16

9 Mbps

40

16

12 Mbps

40

16

18 Mbps

40

16

24 Mbps

40

16

36 Mbps

25.1

14

48 Mbps

20

13

54 Mbps

20

13


IEEE 802.11b

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 D-4 indicates the maximum EIRP supported for all regulatory domains for each 2.4 GHz IEEE 802.11b data rate.

Table D-4 Maximum EIRP for IEEE 802.11b

Data Rate
Maximum EIRP for PC-Cardbus Card with 0-dBi Antenna Gain and PCI Card with 1-dBi Antenna Gain
mW
dBm

1 Mbps

100

20

2 Mbps

100

20

5.5 Mbps

100

20

11 Mbps

100

20


IEEE 802.11g

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 D-5 indicates the maximum EIRP supported for all regulatory domains for each 2.4 GHz IEEE 802.11g data rate.

Table D-5 Maximum EIRP for IEEE 802.11g 

Data Rate
Maximum EIRP for PC-Cardbus Card with 0-dBi Antenna Gain and PCI Card with 1-dBi Antenna Gain
mW
dBm

6 Mbps

50

17

9 Mbps

50

17

12 Mbps

50

17

18 Mbps

50

17

24 Mbps

50

17

36 Mbps

40

16

48 Mbps

31.6

15

54 Mbps

20

13