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

JANUS 2020 Hand-Held Computer User’s Manual (4MB) NF BC
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Choosing a Protocol Handler
There are three protocol handlers:
PHIMEC The Intermec protocol handler. PHIMEC lets you communicate with
other Intermec devices such as concentrators.
PHPCSTD The PC Standard protocol handler. PHPCSTD provides low-level
communications abilities and protocol services at the DOS level for noncommunications
software, including byte-by-byte transfer and status
information.
RFPH The RF protocol handler. RFPH lets you communicate with devices in
an RF network.
You will use each protocol handler with a specific communications protocol:
Use This Protocol Handler With This Communications Protocol
PHIMEC User-Defined Protocol
Point-to-Point Protocol
Polling Mode D Protocol
Multi-Drop Protocol
PHPCSTD PC Standard Protocol
RFPH RF Protocol
Note: You do not load a protocol handler if you choose No Protocol as your
communications protocol. For example, if you decide to use the Interlnk
communications application, you do not need a communications protocol or protocol
handler, so you choose No Protocol and do not load a protocol handler.
PHIMEC and PHPCSTD are not loaded when you boot your reader because
they use a lot of conventional memory. RFPH is loaded when you boot a
JR2020.
When you load a protocol handler that corresponds to the active protocol, the
active protocol tells the protocol handler how to communicate. For help, see
“Loading and Unloading a Protocol Handler” later in this chapter.