Microwave Data Systems iNET 900 Series, Руководство пользователя, Страница: 14 / 180

6 MDS iNET 900 Series User’s Guide MDS 05-2806A01, Rev. E.1
The Access Point is positioned at a location from which it can commu-
nicate with all of the Remote units in the system. Commonly, this is a
high location on top of a building or communications tower. Messages
are exchanged at the Ethernet level. This includes all types of IP traffic.
A Remote transceiver can only talk over-the-air to an Access Point unit
(AP). Peer-to-peer communications between Remotes can only take
place indirectly via the AP. In the same fashion, an AP can only talk
over-the-air to associated Remote units. Exception: Two APs can com-
municate with each other “off-the-air” through their Ethernet connectors
using a common LAN/WAN.
Invisible place holder
Figure 1-2. Typical Wireless LAN
1.2.2 Point-to-Point LAN Extension
A point-to-point configuration ( Figure 1-3 ) is a simple arrangement
consisting of an Access Point and a Remote unit. This provides a com-
munications link for the transfer of data between two locations.
Invisible place holder
Figure 1-3. Typical Point-to-Point Link
1.2.3 Backhaul for Serial Radio Networks
One of the primary design features of the transceiver is to provide a path
for serial devices to migrate to IP/Ethernet. Many radio networks in
operation today still rely on serial networks at data rates of 9600 bps or
less. These networks can use the transceiver as a means to continue
using the serial service, while allowing the rest of the infrastructure to
migrate to an IP format.
Remote
Remote
Access Point
Remote
Remote
LAN
LAN
WAN/LAN
LAN
LAN
LAN/WAN
Access Point
Remote
LAN