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Model DPW939™ USB Wireless LAN Adapter User’s Guide
42
Regulation Domain
IEEE 802.11b/g networks are regulated worldwide because these networks use the 2.4GHz ~ 2.5GHz ISM
(Instrumentation, Scientific, and Medical) Band. The WebSTAR DPW939 USB Wireless LAN Adapter is shipped
with a default regulation domain allowed in your country and location. The FCC (US) and ETSI (Europe) specify
operation from 2.4 GHz to 2.4835 GHz. For Japan, operation is specified as 2.4 GHz to 2.497 GHz. For each
supported regulatory domain, all channels marked with “Yes” are supported. The channel center frequencies and
channel ID (CH ID) numbers are shown in the following table.
DSSS PHY frequency channel plan
.
Regulatory Domain
CH ID Frequency X’10’ FCC X’30’ FCC X’40’MKK
1 2412 MHz Yes Yes Yes
2 2417 MHz Yes Yes Yes
3 2422 MHz Yes Yes Yes
4 2427 MHz Yes Yes Yes
5 2432 MHz Yes Yes Yes
6 2437 MHz Yes Yes Yes
7 2442 MHz Yes Yes Yes
8 2447 MHz Yes Yes Yes
9 2452 MHz Yes Yes Yes
10 2457 MHz Yes Yes Yes
11 2462 MHz Yes Yes Yes
12 2467 MHz – Yes Yes
13 2472 MHz – Yes Yes
14 2484 MHz – – –
In a multiple cell network topology, overlapping and/or adjacent cells using
different channels can operate simultaneously without interference if the distance
between the center frequencies is at least 30 MHz.
Important: Channel 14 is specifically for operation in Japan.
Regulating agencies and allowed channels
Country Regulating Agency Allowed Channels
Unites States FCC 1-11
Europe ETSI 1-13
Japan MKK 1-14