CHAPTER 1
INTRODUCTION
Revised: 24 Jun 04
1-1
EST P/N AA107G
MODEL 195Eg OVERVIEW
The ESTeem Model 195Eg is a IEEE
802.11g and IEEE 802.11b protocol
compatible wireless LAN transceiver that
can used to build a Wireless Local Area
Network (WLAN) for line-of-sight
distances to 7 miles for fixed base and
mobile applications. The IEEE 802.11
WLAN was designed to look and feel like
any IEEE 802 wired LAN. The Model
195Eg can be configured for multiple
modes of operation depending upon the
needs of the wireless and wired LAN
system.
MODEL 195Eg CONFIGURATION
MODES
The Model 195Eg can be configured for
multiple modes of operation without any changes to the hardware:
1.
Access Point Bridge Mode
. When the Model 195Eg is configured as an Access Point it will provide a wireless bridge from
a hardwired Local Area Network (LAN) to laptops, office computers, Personal Digital Assistants (PDA’s), video cameras,
PLC’s, etc. that have integral or external 802.11g or 802.11b wireless devices. All Access Points can be physically
connected to the same network (LAN) or through a radio link but using the Access Point Repeater mode to provide
seamless Ethernet communication for mobile devices. The ESTeem Model 195Eg in Access Point Bridge mode will pass all
network traffic between connected devices including global network broadcasts.
2.
Access Point Router Mode
. In this mode the ESTeem Model 195Eg will function the same as the Access Point Bridge
Mode described above with the following exception, the Access Point Router mode will pass network traffic for connected
devices but will not pass global network
broadcasts. This mode of operation should
be used instead of the Access Point Bridge
mode when connecting the ESTeem to
larger LAN Networks.
3.
Access Point Masquerade Mode
. The
Access Point Masquerade mode is a
special use of the Access Point mode
where the Model 195Eg will connect
802.11g or 802.11b wireless devices as
clients into a single static IP address on a
network. The 195Eg will hide all the IP
addresses connected on the wireless link.
You should use this mode of operation if
Model 195Eg is connected directly to the
Internet with a static IP address (DSL, T1,
etc.) and you want the wireless clients to
access the information through the Model
195Eg (Figure 2). This mode should also be
Figure 1: Access Point Bridge Mode Diagram
Figure 2: Access Point Masquerade Mode Diagram