User Manual

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Table Of Contents

ADCP-75-126 • Issue B • April 2002 • Section 1: Overview

Page 1-3

©

2002,

ADC

Telecommunications,

Inc.

2.3 Handset Interface

The

RU

interfaces

with

the

handsets

through

an

antenna.

In

the

reverse

path,

the

RU

receives

RF

signals

from

each

handset.

The

RU

digitizes

the

RF

signals

and

then

converts

them

to

digital

optical

signals

for

transport

to

the

HU.

In

the

forward

path,

the

RU

receives

digital

optical

signals

from

the

HU.

The

RU

converts

the

optical

signals

to

RF

signals

for

transmission

to

the

handsets.

The

RU

is

connected

to

an

antenna

which

transmits

and

receives

the

handset

RF

signals.

2.4 Local Service Interface

Local

communications

with

an

individual

Digivance

LRCS

system

is

supported

through

a

local

service

interface

capability.

The

primary

component

of

the

local

interface

is

a

PC-type

laptop

computer

loaded

with

the

Digivance

Element

Management

System

(EMS)

software.

The

EMS

provides

the

various

control

and

monitoring

functions

required

for

local

management

of

each

LRSC

system.

The

EMS

computer

can

be

directly

connected

to

either

the

HU

or

RU

through

the

computer’s

RS-232

port.

Operation

is

effected

through

the

EMS

Graphical

User

Interface

(GUI).

The

GUI

consists

of

a

series

of

screens

from

which

the

user

selects

the

desired

option

or

function.

An

RS-232

service

port

is

provided

on

both

the

HU

and

the

RU

for

connecting

the

EMS

computer.

2.5 Remote NOC Interface

Remote

communications

between

a

Network

Operations

Center

(NOC)

and

a

networked

grouping

of

multiple

Digivance

LRCS

systems

is

supported

by

a

remote

NOC

interface

capability.

The

primary

component

of

the

remote

NOC

interface

is

a

PC-type

desktop

computer

loaded

with

the

Digivance

Element

Management

System

(EMS)

software.

In

addition

to

the

local

management

functions

described

in

the

previous

section,

the

EMS

also

provides

the

various

control

and

monitoring

functions

required

for

remote

management

of

multiple

LRSC

systems

through

a

NOC.

A

Controller

Area

Network

(CAN)

port

is

provided

on

each

HU

so

that

up

to

twenty-four

HU’s

can

be

networked

together

in

daisy-chain

fashion

and

controlled

though

the

same

EMS

computer.

The

EMS

computer

connects

to

the

networked

HU’s

through

the

computer’s

RS-232

port

#1.

All

HU’s

can

then

be

controlled

through

the

same

EMS

computer.

The

NOC

is

connected

to

the

EMS

computer

through

a

data

network

or

dial-up

modem.

The

EMS

computer’s

RS-232

port

#2

interfaces

with

the

data

network

equipment.

The

network

or

dial-up

modem

equipment

must

be

capable

of

interfacing

with

an

RS-232

ASCII

interface

port.

At

the

NOC,

control

and

monitoring

of

the

networked

LRCS

systems

are

effected

through

a

Network

Element

Manager

(NEM)

interface

which

requires

only

a

VT100

terminal/emulator

for

operation.

The

NEM

interface

language

consists

of

simple

ASCII

text

strings.

All

communications

are

input

as

either

SET

or

GET

commands

which

result

in

ASCII

text

string

responses

from

the

specified

system

or

systems.

The

EMS

computer

may

also

be

used

locally

to

manage

the

networked

LRCS

systems.

Local

operation

is

through

the

EMS

software

GUI.