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Glossary
RD — Receive data from DCE circuit (all supported interfaces except X.21). See R.
RI — Ring indicator from DCE (RS-232/V.24, EIA-530, and MIL-188c). See IC and CI.
RL — Remote loopback to DCE circuit (all supported interfaces except X.21).
RLSD — Receiver line signal detect from DCE circuit (all supported interfaces except
RS-449/V.36, X.21, and MIL-188-114). See RR.
RR — Receiver line signal detect from DCE circuit (RS-449/V.36, and MIL-188-114).
RS-232 — Recommendation describing a data communications interface that uses
unbalanced, bipolar, slew rate limited amplifiers.
RS-449 — Recommendation describing a data communications interface that uses
balanced V.11 amplifiers for all circuits except test mode circuits. The RS-449 test mode
circuits use unbalanced V.10 amplifiers. The V.10 amplifiers can also be used for
signaling circuits.
RS — Request to send to DCE circuit (RS-449/V.36, and MIL-188-114).
RT — Receiver signal element timing from DCE circuit (all supported interfaces except
V.35 and X.21). See S and SCR.
RTS — Request to send to DCE circuit (all supported interfaces except RS-449, V.36,
X.21, and MIL-188-114). See RS and C.
Rx — Receive.
S
S — Receiver signal element timing from DCE circuit (X.21).
SCR — Receiver signal element timing circuit (V.35).
SCT — Transmitter signal element timing from DCE circuit (V.35).
SCTE — Transmitter signal element timing to DCE circuit (V.35). See TT and X.
SD — Transmit data to DCE circuit (RS-449/ V.36, V.35, MIL-188-114).
Secs — Seconds.
Slew rate — The maximum rate of change of an output signal.
ST — Transmitter signal element timing from DCE circuit (all supported interfaces
except V.35 and X.21). See SCT and X.
Sync — Synchronous. Appears on the user interface.
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Data Communications and Diphase Testing Manual
21148872, Rev. 002 January 2016