Motorola MC70 T, U

Symbol Length. Length of symbol measured from the beginning of the quiet zone (margin) adjacent to the start

character to the end of the quiet zone (margin) adjacent to a stop character.

Symbology. The structural rules and conventions for representing data within a particular bar code type (e.g. UPC/EAN,

Code 39, PDF417, etc.).

T

TCP/IP. (Transmission Control Protocol/Internet Protocol) A communications protocol used to internetwork dissimilar

systems. This standard is the protocol of the Internet and has become the global standard for communications. TCP

provides transport functions, which ensures that the total amount of bytes sent is received correctly at the other end.

UDP is an alternate transport that does not guarantee delivery. It is widely used fo r real-time voice and video

transmissions where erroneous packets are not retransmitt ed. IP provides the routing mechanism. TCP/IP is a

routable protocol, which means that all messages contain not only the address of the destination station, but the

address of a destina tio n ne twork. This allows TC P/IP messages to be sent to multiple networks within an

organization or around the world, hence its use in the worldwide Internet. Every client and server in a TCP/IP

network requires an IP address, which is either permanen tly assigned or dynamically assigned at sta rtup.

Telnet. A terminal emulation protocol commonly used on the Internet and TCP/IP-based networks. It allo ws a user at a

terminal or computer to log onto a remote device and run a program.

Terminal. See Mobile Computer.

Terminal Emulation. A “terminal emulat ion ” em u lat es a character-ba se d ma in fra m e se ssio n on a remo te

non-mainframe terminal , including all display features, commands and fun ction keys. The VC5000 Series supports

Terminal Emulations in 3270, 5250 and VT220.

Terminate and Stay Resident (TSR). A program under DOS that ends its foreground execution to remain resident in

memory to service hardware/software inter rupts, providing background operation. It remains in memory and may

provide services on behalf of other DOS programs.

TFTP. (Trivial File Transfer Protocol) A version of the TCP/IP FTP (File Transfer Pr otocol) protocol that has no directory

or password capability. It is the protocol used for upgrading firmware, downloading software and remote booting of

diskless devices.

Tolerance. Allowable deviation from the nominal bar or space width.

Transmission Control Protocol/Internet Protocol. See TCP/IP.

Trivial File Transfer Protocol. See TFTP.

TSR. See Terminate and Stay Reside nt.

UDP. User Datagram Proto co l . A prot oc ol with in th e IP pro to c ol suite that is used in place of TCP when a reliable

delivery is not required. For example, UDP is used for real-time audio and video traffic where lost packets are simply