Glossary

PRM

Performance Report Messages. Messages indicating the current state of a T1 line as

 

specified by ANSI-T1-403.

protocol

A set of rules that determines the behavior of devices in achieving and maintaining

 

communication.

PSTN

Public Switched Telephone Network. A network shared among many users who can use

 

telephones to establish connections between two points. Also known as dial network.

Ptrns branch

Test Patterns branch of the DSU/CSU menu tree.

pulse density

A measure of the number of ones (marks, pulses) in relation to the total number of bits

 

transmitted.

QRSS

Quasi-Random Signal Source. A test pattern simulating a random pattern of digital ones

 

and zeros used to simulate normal transmission.

RAM

Random-Access Memory. Read/write memory that is volatile and loses its contents when

 

power is removed.

register

A part of the device’s memory that holds stored values.

Rel branch

Release branch of the DSU/CSU menu tree.

reset

An initialization of the device that occurs at power-up or in response to a reset command.

RFC

Request for Comments. One of the documents published by the Internet Engineering Task

 

Force that describe Internet protocols and policies.

RIP

Routing Information Protocol. A protocol for exchanging routing information.

RJ48C

An 8-position modular connector.

RLB

Repeater LoopBack. Loops the signal being sent to the network back to the DTE

 

Drop/Insert and data ports after it has passed through the framing circuitry of the device.

Rlpbk branch

Remote Loopback branch of the DSU/CSU menu tree.

router

A device that connects LANs by dynamically routing data according to destination and

 

available routes.

RS-232

An Electronic Industries Association’s standard for a low-speed, 25-position, DCE/DTE

 

interface.

RS-232-like MIB

RFC 1659, which defines objects for managing RS-232-type interfaces (e.g., RS-422,

 

RS-423, etc.) and supports synchronous data ports and management communication ports

 

on the device.

RS-449

An Electronic Industries Association’s standard for a general-purpose, 37-position,

 

DCE/DTE interface.

RTS

Request to Send. A signal from the DTE to the device, indicating that the DTE has data to

 

send. V.24 circuit 105.

RX

Receive. To obtain transmitted signals.

RXC

Receive Clock. V.24 circuit 115.

RXD

Received Data. Pin 3 of the EIA-232 interface that is used by the DTE to receive data from

 

the modem. Conversely, the modem uses Pin 3 to transmit data to the DTE.

SDCP

Shared Diagnostic Control Panel. A feature that allows carrier-mounted devices to share the

 

same diagnostic control panel.

self-test

A test that checks most hardware components when power is applied to the device or a

 

reset is initiated.

GL-8

February 2001

3160-A2-GB21-90

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Paradyne 3160-A3 Protocol, Ptrns branch, Pulse density, Register, Rel branch, Reset, Rlpbk branch, Router, RS-232, RS-449