I have answered each of your questions seperately,
1.I have been researching the use of the two unlicensed spectrums in the UK.
These are 2.4 and 5 GHz.
Within the 5 GHz spectrum there are 3 bands, the lower two, (A,B) have been
designated licence exempt.
The two bands are:
Freq Range Service Max EIRP
Addit. req's
A: 5150-5350 Mhz mobile, indoor only 200 mW DFS,
TPC
B: 5470-5725 Mhz Mobile, outdoor 1W
DFS, TPC
(Reply)
UK has implemented interim regulations that allow products without
DFS (such as 802.11a) to use the band 5150 to 5350 MHz. The power level
for these systems is 120 mW EIRP if TPC is implemented; otherwise it is
only 60 mW. The Cisco 802.11a products have been notified in the UK and
are now being placed on the UK market.
The UK interim regulations are covered by the Interface Requirement
IR2006 (Attached). You will notice that the date for this IR is October
2002. However, it was only recently (Jan 2003) that the spectrum became
license free.
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2.Having taken a look at the Aironet 1200 AP Datasheets and the
frequencies for 5 Ghz ( 5.15 to 5.35 GHz (FCC UNII 1 and UNII 2) I can
see that only band A is supported. Band A has been specified for indoor
use.
(Reply)
Yes, that is the present situation.
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3.Is there any planned support for the 5470-5725 mhz band?
(Reply)
Yes. The details of the DFS requirements for the B band are incomplete.
These are being worked on by the ETSI BRAN committee as
part of a 5GHz Harmonized Standard. It may turn out that it is not
possible to complete this standard until after the 2003 World Radio
Conference (WRC) to be held in Geneva throughout June. The good news
part of this delay is that it arises because there is an excellent chance we
will get a worldwide co-primary allocation of the A and B 5GHz bands for
Radio LANs at this WRC. Given normal voting and ratification delays, we
expect the Harmonized Standard to be available no later than 1QCY04.
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4.Also, do the Aironet's support Dynamic Frequency selection (DFS) which
will be a requirement in the UK in areas of dense spectrum usage.
(Reply)
DFS will be required in the UK to access the full spectrum
(455 MHz = A + B Bands = 19 channels). The Aironet 5GHz
products do not currently support DFS because the standard for it is not
completed. Cisco engineers are very active in this standards work
and Cisco products will include DFS as soon as possible after
the standard is finalized.
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5.Does anyone know of any 802.11a implementations in the UK? How did they
get around this issue.
(Reply)
As noted above, interim regulations that were implemented last
October allow sale and use of products without DFS capability in the band
5150 to 5350 MHz. At that time a license was still required, but that
has changed as of end of Jan 2003. There is no need anymore for a
license and you will soon be able to buy Cisco 5GHz products in the UK.
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