Quick Eagle Networks DL3800E manual RS232-C, RS449, RTSRequest to Send, SCR Serial Clock Receive

G

RS232-C

An EIA specified physical interface, with associated electrical signaling, between data circuit terminating equipment (DCE) and data terminating equipment (DTE).

RS449

A common 37-position interface for data terminal equipment and data circuit terminating equipment employing serial binary data interchange. It is a balanced interface, based on unipolar digital signals, depending more on current flow than voltage, therefore supports greater distances than the RS-232 interface.

RTS(Request to Send)

A signal sent by DTE to DSU/CSU indicating DTE has data ready to transmit.

S

SCR (Serial Clock Receive)

A unipolar clock from the DCE signal. A data port signal.

SCT (Serial Clock Transmit)

A unipolar clock from the DCE signal. A data port signal.

SCTE (Serial Clock Transmit External)

The clock signal is echoed from the DTE for the purpose of timing incoming data on long cable runs.

scrambler

A device or software program that encodes data for encryption. It distorts a voice or data conversation so that only another like device can figure out the content of the message.

SD (Send Data)

A signal from DTE to DSU/CSU.

secondary channel

A subchannel derived from the main channel. It does not carry data messages and is used for diagnostic or supervisory purposes.

serial transmission

A sequential transmission of bits constituting an entity of data over a data circuit.

SES (Severely Errored Second)

A second during which 320 or more CRC violations or OOF events have occurred (ESF framing only).

G-12 DL3800E Inverse Multiplexer User’s Guide — July 9, 2001