TM 11-5815-602-10
EE161-DM-OPI-010/E154UGC74
TO 31W4-2UGC74-1
1-7. GLOSSARY
An abbreviation for, American Standard Code for Information inter-
ASCII . . . . . . . . . . . . . . . . . .
change. A seven-bit plus parity code developed by the American
Standards Association. (Refer to Appendix E for complete descrip-
tion of ASCII).
Baud Code FIG-LTRS . . . . .
readers. Five bits can accept only 32 special codes, of which two
are figures (FIGS) and letters (LTRS). Placing the FIGS or LTRS code
before other bit combinations permits dual definition of the remain-
ing codes. So when a Baudot terminal is interfaced to a computer,
the software must maintain proper FIGS-LTRS status in order to
interpret the necessary data properly.
In data communications, a fixed amount of time is devoted to sen-
Baud Rate . . . . . . . . . . . . . .
ding a pulse, known as a binary digit or "bit".A bit can be either a
positive pulse, as a telegraph dot, or a blank, as a telegraph pause.
The number of bits that can be transmitted in one second is the
baud rate.
A storage device used to compensate for difference in the rate of
Buffer . . . . . . . . . . . . . . . . . .
flow of information or the time of occurence of events.
Any ASCII character used as a space or separator. It cannot appear
Delimiter . . . . . . . . . . . . . . .
in the same string for which it is a delimiter.
A group of binary digits, including data and call control signals,
Envelope . . . . . . . . . . . . . . .
which is transmitted or received as a complete unit. The data, all
control signals, and possibly error control information, are arranged
in a specific format.
Two digits (2 numbers or a number and a letter) representing the
Hexadecimal Code . . . . . . .
ASCII code for a character. (See Appendix G, table G-1, "HEX-ASCII"
Conversion.) Hexadecimal digits are used in the End-of-line subcom-
mand in a sequence in place of a carriage-return, and in the
Tenvelope and Renvelope subcommands start and stop sequences.
System abbreviation for hexadecimal digits is HH.
Interface . . . . . . . . . . . . . . . .
A method used to interconnect two equipments or systems. The
method includes the type, quality and function of the interconnec-
ting circuits and the type and form of signals to be interchanged
through these circuits.
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