Owner`s manual

Glossary
61
Multipoint circuit - a type of DDS network that includes one control
station, attached remote stations, and all channel, MJU and digital
access lines for station interconnection.
O
OCU (Office Channel unit) - a DSU/CSU located in the telco
central office.
OOS (Out Of Service) - a condition that occurs when a digital
service failure is detected by the network.
P
Point-to-point - a circuit with two point directly connected, with no
intermediate nodes, computers or branched circuits (but possibly
switching facilities). A type of connection that links two (and only
two) logical entities (e.g., a phone line circuit). Contrast multipoint.
R
Remote station - a device on a multipoint DDS network that
communicates with the master station via the OCU. All remote
stations on the DDS must operate at the same bit rate. (AKA,
outlying station.)
RJ (Registered Jack) - a connector for use at customer site (e.g.,
RJ11, RJ45, RJ48).
RTS (Request To Send) - a lead on the terminal interface. Also a
communications device handshaking signal; generated by the
receiving device in order to condition a remote transmitter to begin
data transmission.
S
Serial - a type of communications between two devices in which
data is transmitted one bit at a time.
Subrate - a data transmission rate of less than or equal to 19.2K
bps.
Synchronous transmission - data communications where the
transmitting and receiving devices are synchronized and characters
or bits are sent at a fixed rate.
System status - optional conditioning of the DSR signal.
82023101.p65 2/12/01, 2:52 PM61