IBM SY27-0345-06 manual Cru

B

the directory database in network nodes where fre-

quently used directory information can

be

stored

to

baud .

(1) A unit

of

signaling

speed

equal

speed

directory

searches.

to

the

number

of

discrete

conditions

or

signal

events

per

.

Hardware

or

software

that

is

part

of

second;

for

example,

one

baud

equals

component

one-half

dot

unit.

cycle

per

second

in

Morse

code,

one

bit

functional

per

second

in

a

train

of

binary

signals,

and

one

3-bit value per

second

data

communication,

an

association

connection

.

In

in

a

train

of

signals each

of

which

can

assume

one

of

established between functional units for conveying inf

eight

different

states. (A)

(2) In

asynchronous

trans-

(A)

mation.

(I)

mission,

the

unit

of

modulation

rate

corresponding

to

one

unit

interval

per

second;

that

is,

if

the

duration

A

of

of

establishing electrical

flow.

connector

.

means

the

unit

interval

is

20

milliseconds,

the

modulation

rate

is

50

baud. (A)

customer-replaceable

unit

(CRU)

.

An

assembly

or

BIOS .

Basic

Input/Output

System.

part

that

a

customer

can replace in its entirety wh

any

of

its

components

fail. Contrastfield

withreplace-

able

unit

(FRU).

bits per second (bps) . The rate at which bits are

transmitted

per

second. Contrastbaud.with

D

bootstrap

.

(1) A

sequence

of

instructions

whose

exe-

cution

causes additional instructions to be loadeddata terminalandequipment (DTE)

.

(1) That

part

of a

executed until the complete computer

program datais instation

that

serves

as

a

data

source,

data

s

storage. (T) (2) A technique or device

designedboth. to(I)bring(A)

(2) Equipment

that

sends

or

receives

itself

into a desired state by means of itsor bothown.action,

for

example,

a

machine

routine

whose

first few

instructions

are sufficient to bring the

rest

of

dc .

Direct current.

itself

into

the

comput

r

from

an

input

device.

(A)

DCE .

Data

circuit-terminating

equipment.

bps .

Bits

per

second.

DECnet

.

A

network architecture that defines the op

bridge .

A

functional

unit

that

interconnects

tion

of

a

family

of

software

modules,

databases,

an

multiple

LANs

(locally

or

remotely)

that

use

the

same

hardware

components

typically

used

to

tie

Digital

Equ

logical

link

control

protocol

but

that

can

use

different

ment

Corporation systems together for resource

medium

access

control

protocols. A

bridge

forwards

sharing,frame

distributed computation, or remote system con

to

another

bridge

based

on

the

medium

access

figuration. DECnet network implementations follow the

control

(MAC)

address.

Digital

Network

Architecture

model.

bridging

.

The

forwarding

of

a

frame

from

device

.

A

mechanical,

electrical,

or

electronic

one

local

with

a

specific

purpose.

contrivance

area network segment to another. The destinati

s

based

upon

the

medium

access

control

(MAC)

sublayer

digital

.

(1) Pertaining

to

data

that

consist

of digits

address encoded in the destination address field

of

the

frame

header.

(2) Pertaining

to

data

in

the

form

of

digits. (A)

(3

trast

withanalog.

buffer .

(1) A

portion

of

storage

used

to

hold

input

or

output

data

temporarily.

(2) A

routine

or

display

station

.

(1) A

physical

device

that

can

be

storage

used

to

compensate

for

a

difference

in

data

used

as

multiple

logical

consoles.

(2) An

input/output

rate

or

time

of

device containing a display screen and an attached

occurrence of events, when transferring data from one

device

to

another.

(A)

board

that

allows a user to send information to or

receive

information

from

the

systemterminal. See

also

C

and workstation.

DRAM

.

Dynamic

Random

Access

Memory.

C .

Celsius.

drop .

A

cable

that

leads

from

a

faceplate

to

the

cache .

(1) A

special-purpose

buffer

storage,utionsmallerpanel

in a wiring closet. When

the

IBM

Cabling

and faster than main storage, used to hold Systemacopyis ofused with

the IBM Token-Ring Network, a

instructions

and

data

obtained

from

main

storagedrop andcan

form

part

of

a lobelobe. .See

also

likely

to be needed next by

the

processor. (T)

(2) To

place,

hide,

or

store

in

a cache.

(3) An

optionalDTE .

Datap rt

terminalof

equipment. (A)

X-2

2210

Service

and

Maintenance