Radio Shack Modem 4P Operation Manual

Custom Maiw'aaurfld in

USA By RADIO SHAClC A DivlMm ol TANDY CORPORATION

Modem

4P

Operation

Manual

Important Note

Before

connecting your Modem

4P

to me phone lines, notify your local telephone

company of the:

Manufacturer; Radtu Shack

Model.

Modem 4P

Lisoc Number: Rjnc

FCC

Registration Number: AAO

68U-S861

6-UM-E

Ringer Equivalence Number (REN):

0.7B

TTtS-66

Modmm

4P Ope-cetlon Manual S

1903

Tandy Corporation,

Fort

Worth,

Texas 76102 USA

All

Right*

Reserved

RftprorliintirKi nr urb. without

fwpmas written

permission

from Tandy

Corporation,

Of

any

portion ol this manual is prohibited.

While

reasonable etforta have been

taker)

in

the preparation of this

manual

to assure ns

accuracy. Tandy Cwpcailon

asfuriMK no habafty

iseurting From any errors

or

omia*ior>B fn this

manual,

or

from

the

use

of the information contained herein.

Contents

Introduction

>.iii

i

Description ot the Modem 4

H

1

2/Settlng Up

the Modem

4P

3

Installing the Modem

4P

3

Connecting the

Telephone

to the Modem

4P

4

3/Prog

ramming the Modem 4P

„..,.,

,,, 9

4/Troubleshooting

and Maintenance

17

^/Specifications

19

Appendix A/How Quickly Does Your Modem

Dial? 21

Appendix B/Modem 4P Programming Commands

23

Appendix C

Technical Information

29

Introduction

Congratulations on

your purchase

of the Modem

4R This

modem

has no

swilclws

ut liyl its arid is entirely

controlled

by Model

4P

Compiler

keyboard entries.

A

card

edge

connector at

one end of

the card connects the modem

to

the

computers

power circuitry

The other end of

the card has

two

telephone

connectors which

let you attach

a

telephone in parallel

with existing telephone

circuitry. Also,

at trie back of

the card is

an RS-232C cable, which

connects

to the RS-232C output of

your

computer.

The Modem

flP

is fully controllod

by Iho RS

232C port and

aerial data

ia

passed

from

the computer

to the modem

Commands are

used to program

the Modem 4P via the

keyboard.

You can program the

Modem for Manual/Originate

or Manual;

Answer modes

which

means that

if

you are contacting

a

remote

computer

in

Manual Originate

mode,

you

will

manually dial

the

telephone number,

and when

you

are

in Manual/Answer

mode,

you

will

manually answer

an incoming

call. Or, you can program

the

Modem for Auto/Originate or

Auto/Answer

which means that

whftn in Autn/Orkjirwte

mode, ihe

Modem will

automatically dial

the

telephone number of

a

remote

computer, and when

in Auto/

Answer

mode,

the Modem will automatically

answer an incoming

call.

ii!

Ill ddditivn, Um Modem 4P has these features:

Easy installation

Fully programmable from

the keyboard

Auto Dial

and Auto Answer

capability

This

manual will:

Give

a

description

of the Modem 4P

Snow

you how to

program

the

Modern

4P

iV

i/uescnption

oi tne Modem

4P

© Power Supply Connector. Connects with

the Power

Supply

channel

located inside of the Model 4R

® RS.232C Cable. Connect

this cable to

the

Model

4P

s

adjacent

RS-232C Output Channel.

®

Modular- to-Tefephone

Outlet Jack.

Connect

one end of a

iiiudulai-tyutt

cable

to

this

Jack. Connect the other end

of

the modular-type

cable to the

connector

labeled,

TO WALL.

Connect the other end to a modular

telephone outlet

$

Modem-to-Tetepbone

Jack. Connect

the modular

cable

from

the

telephone to the Jack labeled,

TO PHONE.

Note:

The TO WALL and TO PHONE Jacks are

interchangeable.

jHunifc

Figure 1. Modem 4P

2/Setting

Up the

Modem 4P

Figure 2. Installing

the Modem

4P

1

.

Turn off all power

to you

r

Model 4R

2. Open the panel on the back of the

computer, Remove

the

rtWlal

pl«quw

uver Ihw RS-232C uunnecluf using

a.

VU-inch

socket

nut driver.

3. Insert the Modem 4P (components

cido down) into the cord

slot.

4.

Connect the RS-232C

cable

to

the Model 4P's

RS-232 output

channel.

C onnecting

the Telephone to the Modem

4P

The way you connect your

Modem 4P depends on

how

your

telephone is connected to the wall. The

following figures illustrate

these connections.

It

your

telephone

has the older

style, four-prong,

connection,

use

an adapter

(279-360)

to connect tt to

your

modem.

II

your telephone is wired directly

to

the wall,

contact your

telephone company.

Figure

3. Modular

Connector