JANUS? 2020 Hand-Held Computer (4MB) - Intermec

JANUS 2020 Hand-Held Computer User’s Manual (4MB) NF BC
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Choosing a Communications Application
You can use one of the three communications applications provided with your
reader, you can create a JANUS PSK communications application, or you can
purchase a third-party communications application:
Communications Manager You can use Communications Manager to transmit
and receive data files, and to request COM port and protocol status. For help, see
“Running Communications Manager” later in this chapter.
Interlnk You can use this DOS utility to access the drives on the host computer
as if they are on the reader, and vice versa. For help, see “Running Interlnk to
Transfer Files” later in this chapter.
IRL Desktop You can use the IRL Desktop to transfer IRL programs and IRL
data files between the reader and a host computer. For help, see Chapter 7,
“Working With IRL.”
JANUS PSK communications application You can create your own
communications application using the software libraries provided with the
JANUS Programmer’s Software Kit. For help, see your JANUS PSK reference
manual.
File transfer application for BFT You can use the file transfer application to
transfer binary files. For help, see “Downloading Applications Across the
Network” later in this chapter.
Third-party communications application You can use a third-party
communications application that conforms to the requirements of the JANUS
reader.
Choosing a Communications Protocol
The reader can communicate in any of seven configurable protocols. The
protocols are introduced briefly here. For details about their characteristics and
parameters, see “Communications Protocol, Configure” in Chapter 12.
Multi-Drop Protocol Multi-Drop follows the same protocol sequences as Polling
Mode D with the extension of device addressing, which allows up to 32 devices
on one 4-wire RS-485 twisted pair line. Multi-Drop protocol is typically used in
CrossBar networks. Due to timeout parameters, the baud rate must be 2400 or
higher.
No Protocol No Protocol is for communications applications, such as Interlnk,
that directly access the COM port instead of using a protocol handler. When
you do not use a protocol, you can switch between direct COM port access and
using a protocol handler.