ENC-900 Operating Manual: Chapter 3 Configuration Options
15
M
S
Network 1
M
S
R
M
S
R
Network 2
M
S
S
S
Network 3
M
R
S
S
S
Network 4
M
R
S
R
S
Network 5
Figure 4 - Sample Network
Topologies. Virtually any
Combination of Remotes and
Repeaters May be Used.
Master Point-to-Point
: The modem is configured to communicate
with a single
Remote
, either directly, or through one or more
Repeaters
.
Master Point-to-Multipoint
: The modem is configured to
communicate with one or more
Remotes
and/or
Repeaters
.
Remote
: The modem is configured to communicate with one
Master
either directly or through one or more
Repeaters
.
.
Repeater
: The modem is configured to pass information from
either a
Master
or another
Repeater
onto subsequent
Repeaters
and/or
Remotes
and vice versa. The
Repeater
also acts as a
Remote
in the sense that, like a
Remote
, it passes information to/from its
serial port.
Examples of different network topologies are shown in Figure 4. Network 1
shows Point-to-Point communication between a Master and Remote.
Network 2 makes use of a Repeater to communicate with the Remote.
Network 3 illustrates a simple Point-to-Multipoint network with no
Repeaters. Networks 4 and 5 gives examples of Point-to-Multipoint
networks consisting of both Repeaters and Remotes. There is effectively no
restriction to the number of Repeaters and Remotes that can be added to a
network. As seen in Network 4, a Master can communicate directly with
both Remotes and Repeaters.
3.2 Command Mode
The ENC-900 firmware has been designed to allow the user to customize the
operation of the modem through an AT Command Interface. This interface
is ideal for direct interface with another microcontroller or for higher level
Windows-based software applications, but also contains user-friendly built-in
register descriptions. These descriptions make it easy for the user to
configure the unit by manually inputting AT Commands and modifying S-
Register parameters, using any standard terminal program. The ENC-series
development board is a useful tool for familiarizing yourself with the various
operating parameters and user interface. Reference schematics for the
development board can be found in the development kit user’s manual. To
access the ENC-900’s command mode using the development board:
1.
Insert the module into the socket with the antenna connector at the
end near the power jack.
2.
Attach the supplied antenna.
3.
Connect a straight through serial cable between the DB9 connector
and the serial port on your PC
4.
Run any terminal application program such as Hyperterminal
5.
Set the serial port to 9600 baud, 8N1
6.
Apply power to the development board
7.
While the three RSSI LED’s are blinking, type ‘ENC’ (you have
about 5 seconds to do this). The modem should respond with ‘OK’.
8.
Type ‘AT&V <ENTER>’
Summary of Contents for ENC-900
Page 9: ...ENC 900 Operating Manual Chapter 2 Electrical Physical 5 ...
Page 17: ...ENC 900 Operating Manual Chapter 2 Electrical Physical 13 ...
Page 44: ...40 ENC 900 Operating Manual Chapter 4 Configuration ...
Page 46: ...42 ENC 900 Operating Manual Appendix A Modem Command Summary ...
Page 48: ...44 ENC 900 Operating Manual Appendix B Factory Default Settings ...
Page 50: ...46 ENC 900 Operating Manual Appendix C Technical Specifications ...
Page 54: ...50 ENC 900 Operating Manual Appendix E Approved Antennas ...
