Specifications

General 11
Customer buys new APs for the a/n-radio only and keeps the old single-radio b/g APs
intact.
New APs set to use only the a-radio. High throughput (HT) only in Greenfield mode.
Customer buys new APs for the a/n-radio as an extension and keeps the old dual-radio b/
g/a APs intact.
The customer adds a new area to its existing WLAN, for example an extra building, and wants to
benefit from 802.11n in the new building.
Customer buys new APs for the n-radio and keeps the old a/b/g dual radio APs intact.
The customer adds n-supported APs across the complete site.
b/g old AP a new AP Comment
Voice + data (legacy)
20 MHz only
Data (HT)
40 GHz only
This may be a solution when upgrading to 802.11n.
All laptops can then benefit from the HT speeds of the a/n
radio, and the higher amount of channels to choose from.
Non-HT clients like handsets stay on the old APs.
There is no need for 802.11n support on the b/g band.
Upgrade old b-clients if possible to g-clients.
b/g/a old AP a/g new AP Comment
Voice + data (legacy)
20 MHz only
a-radio: Data(HT) and
Greenfield mode
40 GHz only
g-radio:
Voice + data (legacy)
20 MHz only
All laptops can then benefit from the HT speeds
of the a/n radio, and the higher amount of chan
-
nels to choose from.
Non-HT clients like handsets must be supported
on both the old and new APs.

There is no need for 802.11n support on the b/g
band.
If possible, upgrade old b-clients to g-clients.
b/g old AP a old+new AP Comment
Voice +
data (legacy)
20 MHz only
Data(HT)
40 GHz only
DFS+non DFS
Greenfield
Turn off the a-radio in the a/b/g APs. This leaves the old AP to
support only b/g clients.
New APs set to use only the a-radio. HT only Greenfield mode.