Symbol-technologies MC9000-K User Manual download pdf (Page 515)

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101

Glossary

GL-13

Open Data-Link Interface (ODI) Novell’s driver specification for an interface between

network hardware and higher-level protocols. It supports

multiple protocols on a single NIC (Network Interface

Controller). It is capable of understanding and translating

any network information or request sent by any other ODI-

compatible protocol into something a NetWare client can

understand and process.

Open System Authentication Open System authentication is a null authentication

algorithm.

PAN

Personal area network. Using Bluetooth wireless

technology, PANs enable devices to communicate

wirelessly. Generally, a wireless PAN consists of a dynamic

group of less than 255 devices that communicate within

about a 33-foot range. Only devices within this limited area

typically participate in the network.

Parameter A variable that can have different values assigned to it.

PC Card A plug-in expansion card for laptop computers and other

devices, also called a PCMCIA card. PC Cards are 85.6mm

long x 54 mm wide, and have a 68 pin connector. There are

several different kinds:

Type I; 3.3 mm high; use - RAM or Flash RAM

Type II; 5 mm high; use - modems, LAN adaptors

Type III; 10.5 high; use - Hard Disks

PCMCIA Personal Computer Memory Card Interface Association.

See PC Card.

PDT Portable Data Terminal.

Percent Decode The average probability that a single scan of a bar code

would result in a successful decode. In a well-designed bar

code scanning system, that probability should approach

near 100%.

PING (Packet Internet Groper) An Internet utility used to

determine whether a particular IP address is online. It is

used to test and debug a network by sending out a packet

and waiting for a response.

Print Contrast Signal (PCS) Measurement of the contrast (brightness difference)

between the bars and spaces of a symbol. A minimum PCS

value is needed for a bar code symbol to be scannable. PCS

= (RL - RD) / RL, where RL is the reflectance factor of the

background and RD the reflectance factor of the dark bars.

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