Glossary GL-5
Data Communications Equipment (DCE) A device (such as a modem) which is designed to attach
directly to a DTE (Data Terminal Equipment) device.
DCE See Data Communications Equipment.
DCP See Device Configuration Package.
Dead Zone An area within a scanner's field of view, in which specular
reflection may prevent a successful decode.
Decode To recognize a bar code symbology (e.g., UPC/EAN) and
then analyze the content of the specific bar code scanned.
Decode Algorithm A decoding scheme that converts pulse widths into data
representation of the letters or numbers encoded within a
bar code symbol.
Decryption Decryption is the decoding and unscrambling of received
encrypted data. Also see, Encryption and Key.
Depth of Field The range between minimum and maximum distances at
which a scanner can read a symbol with a certain minimum
element width.
Device Configuration Package The Symbol Device Configuration Package provides the
Product Reference Guide (PRG), flash partitions, Terminal
Configuration Manager (TCM) and the associated TCM
scripts. With this package hex images that represent flash
partitions can be created and downloaded to the mobile
computer.
DHCP (Dynamic Host Configuration Protocol) Software that
automatically assigns IP addresses to client stations
logging onto a TCP/IP network. Similar to BOOTP, but also
permits the leasing of an IP address. It eliminates having to
manually assign permanent IP addresses. DHCP software
typically runs in servers and is also found in network
devices such as routers that allow multiple users access to
the Internet.
DHCP Server A server in the network or a service within a server that
assigns IP addresses.
Discrete Code A bar code or symbol in which the spaces between
characters (intercharacter gaps) are not part of the code.
Discrete 2 of 5 A binary bar code symbology representing each character
by a group of five bars, two of which are wide. The location
of wide bars in the group determines which character is
encoded; spaces are insignificant. Only numeric characters
(0 to 9) and START/STOP characters may be encoded.
DNS Server The Control Panel allows you to set the IP address for a
DNS Server, if used. This allows users to use server names,
rather than IP addresses. It is set on the Network tab of the
Control Panel.
Domain Name The Control Panel allows you to set a Domain Name for the
DNS Server, if used (e.g., symbol.com). It is set on the
Network tab of the Control Panel.
DOS Disk Operating System. This is basic software that allows
you to load and use software applications on your
computer. Also see NetID.
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