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

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

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Locating the Communications Ports<br />

nugget<br />

nuggetTYTR TYTRLeaning How to Use the Reader<br />

2<br />

Communications ports, also called COM ports, are locations from which data<br />

can be passed into and out of the <strong>JANUS</strong> reader. You use serial<br />

communications through a COM port, which means that data is transmitted<br />

one bit at a time over a single line from one computer to another.<br />

You can use the reader’s COM ports to communicate with other devices.<br />

Logical COM4<br />

COM4<br />

Type II PC<br />

card drive containing<br />

a modem card<br />

~<br />

I O<br />

F6 F7 F8 F9 F10<br />

F1 F2 F3 F4 F5<br />

—<br />

A B C D E F<br />

G H I J K L<br />

?<br />

M N O P Q R<br />

S T U V W X<br />

Y Z<br />

–<br />

+<br />

{<br />

– –<br />

[<br />

}<br />

home<br />

<<br />

]<br />

><br />

Ctrl<br />

end<br />

*<br />

*<br />

Alt<br />

(<br />

pg up<br />

Caps<br />

\ /<br />

&<br />

/<br />

7<br />

–<br />

+<br />

$<br />

4<br />

!<br />

/<br />

8 9<br />

%<br />

enter<br />

^<br />

space<br />

f<br />

#<br />

pg dn<br />

5 6<br />

@<br />

Esc<br />

ins del<br />

><br />

.<br />

1 2 3<br />

0<br />

(<br />

num lock<br />

enter<br />

<strong>2020</strong>U.044<br />

COM1<br />

Optical port<br />

You can communicate with other RS-232 devices, such as modems and<br />

terminals, through COM1 by:<br />

• using a JD<strong>2020</strong> Communications Dock.<br />

• using a JL2010 Optical Link Adapter.<br />

• lining up the optical ports of two <strong>JANUS</strong> readers.<br />

You can communicate with other devices in an RF network through the logical<br />

COM4. You can also communicate over telephone lines through COM4 when<br />

you have a modem card inserted in the PC card drive. For help, see Chapter 6,<br />

“Networking the Reader.”<br />

2-33

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