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- Recommendation S.140
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- Add the following terms and definitions:
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- 721.32.01 function control
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- Control of an elementary operation to be performed by a device
- other than recording or printing a letter, figure, punctuation mark
- or graphic symbol contained in a message or in data.
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- 721.32.02 function signal
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- A set of signal elements used to transmit a function control.
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- 721.32.03 control character
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- A character whose occurrence in a particular context, initiates,
- modifies or stops an operation.
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- Note 1 - A control character may be recorded for use in subsequent
- action.
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- Note 2 - A control character is not a graphic character but may
- have a graphic representation in some circumstances.
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- 721.32.04 translation (in telegraphy and data transmission)
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- Function of a telegraph receiver in reestablishing the text of a
- message from the received signal, including the recording of the
- text.
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- 721.32.05 selection (in a telegraph receiver)
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- Primary operation of translation, by which the control function or
- thesymbol to be printed or translated is chosen automatically or
- not, from the received signal.
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- 721.32.06 local record
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- Display of a transmitted message made on a receiver associated with
- the transmitting apparatus.
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- 721.32.07 format effector
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- A function control used to insure a final lay-out of characters for
- printing or display.
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- 721.32.09 carriage return
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- A format effector that returns the printing or display position to
- the commencement point of the line.
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- 721.32.10 case shift
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- The change over of the translating mechanism of a telegraph
- receiving apparatus from one case of character to the other case of
- character.
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- 721.32.11 letters case
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- One of the cases into which the characters, predominantly letter
- characters and functions of a telegraph code with case shift are
- grouped.
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- 721.32.12 letters shift
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- A case shift resulting in a translation of signals as primary
- characters predominantly letter characters, or functions of letters
- case.
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- 721.32.13 letter-shift signal
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- The signal which conditions a telegraph receiver to translate all
- signals received as primary characters or functions or letters case.
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- 721.32.14 figures case
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- One of the cases into which the characters, predominantly numerals
- and signs, and functions of a telegraph code with case shift are
- grouped.
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- 721.32.15 figures shift
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- A case shift resulting in the translation of signals as secondary
- characters, predominantly figure characters, or functions of figures
- case.
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- 721.32.16 figure-shift signal
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- The signal which conditions a telegraph receiver to translate all
- signals received as secondary characters or functions of figures
- case.
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- 721.32.17 space signal
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- Signal corresponding to a code combination which causes the printing
- position to be advanced by the character pitch without printing.
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- 721.32.19 erasure signal
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- A signal used for the purpose of invalidating a previous signal.
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- 721.32.20 "Who are you" signal (function); WRU signal
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- Signal corresponding to a code combination which, when received by a
- telegraph terminal or data station causes an call-sign device to
- transmit an call-sign.
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- 721.32.21 call-sign; answer-back code
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- Unique sequence of characters identifying a particular telegraph
- terminal or data station.
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- 721.32.28 identification request
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- A transmission control used as a request for a response from a
- remote terminal; the response may include the terminal
- identification, or the state of the terminal.
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- 721.32.35 device control
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- A function control designed to control certain ancillary equipments
- associated with a terminal used in particular to switch such
- equipments on or off.
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- 721.32.40 warning signal
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- A function signal which operates an audible or visual calling device
- with a view to attracting attention.
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- 721.32.47 switching signal telex-data
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- A signal which switches a terminal from the telex mode to the data
- transmission mode.
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- 34.025 local end (with its termination)
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- That part of a connection including the apparatus, lines, telegraph
- repeaters and any control units between the apparatus and the first,
- or last point in that connection where the transmission quality can
- be measured.
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