Lucent Technologies PacketStar PSAX, User Manual, Page: 387 / 405

Glossary
Glossary-46 255-700-243
PacketStar
®
PSAX 12-Port Medium-Density DS1 Multiservice Module User Guide , Issue 1 Release 8.0
Reed Solomon (RS) coding An algorithm that performs forward error correction (FEC) in
order to compensate for error bursts in data transmission.
remote access service See RAS.
remote alarm indication See RAI.
remote defect indication See RDI.
remote dial-access server See RAS.
remote input status A reference to how a user defines the external alarm condi-
tion (input) at their site, such as a temperature sensor, that
results in an action (output) such as a fan. When the STA-
TUS/CONTROL connectors on the Alarm module are con-
nected to an external device that is triggered remotely, a sig-
nal is sent, indicating a fault condition, which is displayed by
either
Closed
or
Open
on the
Remote Input Status
field.
repeater A device that receives data on one communication link and
transmits it, bit by bit, on another link as fast as it is received
without buffering.
RFC request for comment. Draft RFCs on particular topics are cir-
culated through the Internet community to gain feedback
from engineers and programmers on proposed TCP/IP stan-
dards about the Internet. The Internet Engineering Task Force
meets three times a year and either adopts what becomes a
standard RFC, or discards it.
right mouse button The right button on a computer mouse. Clicking the right
mouse button on many computer screens brings up a menu
different from the drop-down options, or is more comfortable
for some users.
RIP routing information protocol. A set of rules based on dis-
tance-vector algorithms that measure the shortest path
between points on a network. Each router maintains a rout-
ing table or database with this information and periodically
broadcasts it to neighboring routers.
RJ-11, RJ-45 registered jacks. An RJ-11 is a six-conductor modular jack
typically wired for four conductors, the most common tele-
phone jack in the world. The male connects a telephone,
modem, or fax machine to a female RJ-11 jack in the wall or
floor. The RJ-45 is an eight-pin connector used for transmit-
ting data from a data PBX, a modem, a printer, or a print
buffer over telephone wire.
robbed-bit signaling A popular signaling mechanism used in T1 connections.
Robbed-bit signaling typically uses bits known as A and B bits.
These bits are sent by each side of a T1 termination and are
buried in the voice data of each voice channel in the T1 cir-
cuit, hence the term "robbed bit" as the bits are stolen from
the voice data.