Generally speaking concerning wireless LANs:
The integrity of the signal depends on many factors. Concerning building walls, for example, it depends on what the wall is made of or what is in the wall. Walls with sheet metal covering may reflect the signals, and the radio waves will not penetrate it. Also walls with lots of wiring and poor wiring insulation may cause interference and a degradation of signal, hence poor performance.
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Radio signals/intercoms interference:Generally, there is no interference in this regard. The wireless LAN operates in the 2.4-2.5Ghz range, which was set aside by the FCC for wireless communication purposes. However, newer technologies (such as those based on Bluetooth) will operate inthis frequency range, which may create problems in the future. There is a debate currently going on between the proponents of Bluetooth and those of IEEE802.11 regarding this possible problem and its effects.
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Number of users:
The more users that connect through an access point, the slower the connection becomes for everybody. Maximum bandwidth of the access point is 11Mbit: one user will get the full connection, 2 users will get half each, 4 users one quarter, and so on. In reality about 15 users connected to one access point will see speeds similar to a DSL connection. That is why it is recommended that for installations of more than 15-18 a second access point be considered so that the load can be distributed evenly.
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A speed or duplex mismatch will result in performance issues, intermittent connectivity, and possible loss of communication. Each time a machine is upgraded or the NIC replaced or re-installed, it is important to verify that the NIC and switch port are configured properly.
A chart showing preferable settiong is found at the following site:
http://tc2.inre.asu.edu/datacomm/auto_negotiate/auto.htm
(REM
