VIZMONET BreadCrumb Wireless Nodes (ES1-2450R) : User's Guide : Page 39

Appendix A: Radio Channels and Frequencies

Rajant BreadCrumbs contain from one to four radios, depending on the model. 802.11g radios are used

in the 900 MHz and 2.4 GHz bands. 802.11a radios are used in the 4.8 GHz, 4.9 GHz and 5 GHz bands.

802.11n radios are used in the 2.4 GHz and 5 GHz bands. Each BreadCrumb model supports its own speci-

fied radio or combinations of radios.

The radios support the channels and frequencies listed in the following tables. Which channels are avail-

able for use depends on country and regulatory agency.

Note

Not all channels are allowed for use everywhere around the world. Check with the corresponding wire-

less spectrum regulatory body to determine the subset of channels authorized for use in your country.

Caution

Since the radios operate at different frequencies, you must be careful to use the correct type of antenna

with each radio. As an example, a 2.4 GHz antenna will not work with a 5 GHz radio and vice versa.

A.1 Radio: 2.4 GHz 802.11n

Table: 2.4 GHz 802.11n Radio Channels and Frequencies

Channel Number Center Frequency (MHz) HT40 Capability

1 2412 HT40 +

2 2417 HT40 +

3 2422 HT40 +

4 2427 HT40 +

5 2432 HT40 +, HT40 -

6 2437 HT40 +, HT40 -

7 2442 HT40 +, HT40 -

8 2447 HT40 +, HT40 -

9 2452 HT40 +, HT40 -

10 2457 HT40 -

11 2462 HT40 -

12 2467 HT40 -

13 2472 HT40 -

14 2484 HT20 only

The default channel and channel mode for a BreadCrumb 2.4 GHz 802.11n radio is 11 (2462 MHz) and

HT20. If a second 2.4 GHz 802.11n radio is present, its default channel and channel mode is 1 (2412 MHz)

and HT20.

2.4 GHz channels support HT40 mode. In this mode, the radio binds two standard 20 MHz channels to ob-

tain a wider bandwidth 40 MHz channel. The + or - designation describes if the second channel is above

or below the base channel. Plus (+) indicates that the additional 20 MHz occurs above (at a higher fre-