User's Manual

L400 Operating Manual: Chapter2 General 1
2. General
2.0 Product Overview
The L400 is a high-performance embedded wireless data transceiver.
Operating in the 400 - 480 MHz band, this narrowband module is capable
of providing reliable wireless data transfer between almost any type of
equipment which uses an asynchronous serial interface. The small-size and
superior RF performance of this module make it ideal for many
applications.
While a pair of L400 modules can link two terminal devices (“point-to-
point” operation); multiple modules can be used together to create a
network of various topologies, including “point-to-multipoint” and
“repeater” operation. Multiple independent networks can operate
concurrently, so it is possible for unrelated communications to take place in
the same or a nearby area without sacrificing privacy or reliability.
1.1 Features
Key features of the L400 include:
a serial I/O data port with handshaking and hardware flow
control, allowing the L400 to interface directly to any
equipment with an asynchronous serial interface.
 ease of installation and use – the L400 module uses a subset of
standard AT style commands, very similar to those used by
traditional telephone line modems.
 all units in a system are physically identical, and can be
configured as a master, repeater or slave using the AT
command set. No hardware modifications are required
 32-bit of CRC error detection and auto re-transmit to provide
accuracy and reliability of data.