Cisco Aironet 340, 350, and CB20A Wireless LAN Client Adapters Installation and Configuration Guide for Windows, OL-1394-05
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

Maximum Power Levels and Antenna Gains

IEEE 802.11a

IEEE 802.11b


Channels, Power Levels, and Antenna Gains


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

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


Americas (-A)


Japan (-J)


Singapore (-S)


Taiwan (-T)

34

5170

-

X

-

-

36

5180

X

-

X

-

38

5190

-

X

-

-

40

5200

X

-

X

-

42

5210

-

X

-

-

44

5220

X

-

X

-

46

5230

-

X

-

-

48

5240

X

-

X

-

52

5260

X

-

-

X

56

5280

X

-

-

X

60

5300

X

-

-

X

64

5320

X

-

-

X

149

5745

-

-

-

-

153

5765

-

-

-

-

157

5785

-

-

-

-

161

5805

-

-

-

-


Note All channel sets are restricted to indoor usage except the Americas (-A), which allows for indoor and outdoor use on channels 52 through 64 in the United States.


IEEE 802.11b

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

Table D-2 Channels for IEEE 802.11b

Channel Identifier
Frequency
(in MHz)
Regulatory Domains

Americas (-A)

EMEA (-E)

Israel (-I)

China (-C)

Japan (-J)

1

2412

X

X

-

X

X

2

2417

X

X

-

X

X

3

2422

X

X

X

X

X

4

2427

X

X

X

X

X

5

2432

X

X

X

X

X

6

2437

X

X

X

X

X

7

2442

X

X

X

X

X

8

2447

X

X

X

X

X

9

2452

X

X

X

X

X

10

2457

X

X

-

X

X

11

2462

X

X

-

X

X

12

2467

-

X

-

-

X

13

2472

-

X

-

-

X

14

2484

-

-

-

-

X


Note Mexico is included in the Americas 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 802.11a

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 power levels and antenna gains allowed for each IEEE 802.11a regulatory domain.

Table D-3 Maximum Power Levels Per Antenna Gain  for IEEE 802.11a

Regulatory Domain
Maximum Power Level (mW) with 6-dBi Antenna Gain

Americas (-A)
(160 mW EIRP maximum on channels 34-48, 800 mW EIRP maximum on channels 52-64)

20

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

20

Singapore (-S)
(100 mW EIRP maximum)

20

Taiwan (-T)
(800 mW EIRP maximum)

20


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 power levels and antenna gains allowed for each IEEE 802.11b regulatory domain.

Table D-4 Maximum Power Levels Per Antenna Gain for IEEE 802.11b 

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

Americas (-A)
(4 W EIRP maximum)

0

100

2.2

100

5.2

100

6

100

8.5

100

12

100

13.5

100

21

20

EMEA (-E)
(100 mW EIRP maximum)

0

100

2.2

50

5.2

30

6

30

8.5

5

12

5

13.5

5

21

1

Israel (-I)
(100 mW EIRP maximum)

0

100

2.2

50

5.2

30

6

30

8.5

5

12

5

13.5

5

21

1

China (-C)
(10 mW EIRP maximum)

0

5

2.2

5

5.2

n/a

6

n/a

8.5

n/a

12

n/a

13.5

n/a

21

n/a

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

0

50

2.2

30

5.2

30

6

30

8.5

n/a

12

n/a

13.5

5

21

n/a