Paradyne COMSPHERE 3830 Manuale utente

COMSPHERE 3800

SERIES MODEMS

MODEL 3830

QUICK REFERENCE

Document No. 3830-A2-GL10-00

Printed in U.S.A.

Notice

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express written permission of Paradyne Corporation, 8545 126th Ave. N., Largo,

FL 33773.

Paradyne Corporation makes no representation or warranties with respect to the

contents hereof and specifically disclaims any implied warranties of merchantability or

fitness for a particular purpose. Further, Paradyne Corporation reserves the right to

revise this publication and to make changes from time to time in the contents hereof

without obligation of Paradyne Corporation to notify any person of such revision or

changes.

Changes and enhancements to the product and to the information herein will be

documented and issued as a new release to this manual.

Warranty, Sales, and Service Information

Contact your local sales representative, service representative, or distributor directly for

any help needed. For additional information concerning warranty, sales, service, repair,

installation, documentation, training, distributor locations, or Paradyne worldwide office

locations, use one of the following methods:

Via the Internet: Visit the Paradyne World Wide Web site at

http://www.paradyne.com

Via Telephone: Call our automated call system to receive current information via

fax or to speak with a company representative.

— Within the U.S.A., call 1-800-870-2221

— Outside the U.S.A., call 1-727-530-2340

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COMSPHERE 3800 Series

Modems

Model 3830

Quick Reference

Document Number 3830-A2-GL10-00

January 1999

Product Documentation on the World Wide Web

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Complete documentation for this product is available at www.paradyne.com.

Select

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Business Class Analog Modems

Select the following document:

3830-A2-GB91

COMSPHERE 3800 Series Modems Model 3830 User’s Guide

To request a paper copy of a Paradyne document:

Within the U.S.A., call 1-800-PARADYNE (1-800-727-2396)

Outside the U.S.A., call 1-727-530-8623

Model 3830 Modem Package

After opening the modem’s package, check for damage and verify that the following

items are present:

Model 3830 modem

Power transformer

One 6-position, 4-wire modular cord

Two ferrite chokes and cable ties

If any hardware components are damaged, notify your service representative. See the

Warranty, Sales, and Service Information

section in the front of this document.

Customer-Supplied Equipment

The following customer-supplied equipment is required to complete a data

communications system using Model 3830 modem:

A DTE with an available EIA-232-D serial port.

A standard EIA-232-D male-to-female cable with a male DB-25-S connector at one

end to attach to the modem.

An ac line cord with an IEC 320 connector and appropriate wall plug if using the

220-240V power transformer.

One of the following modular dial or leased network interfaces:

— RJ11C for dial permissive applications

— JM8 for leased-line applications only

Model 3830 Installation

Before installing your modem, read the

Important Safety Instructions

on page 15

Make sure your installation site is clean and well-ventilated. Allow space around the

modem for installing cables and telephone cords, and make sure the modem is located

within reach of the ac power outlet. The distance between your modem and DTE

should be minimized if DTE data rates exceed 19,200 bps. Also, low capacitance

cables may be necessary for speeds greater than 19,200 bps or distances greater than

50 feet.

The rear panel of the Model 3830 modem has the following switches and connectors:

An ON/Off power switch.

A 5-pin DIN type power receptacle for ac power transformer.

An 8-pin modular keyed jack for external telephone set use only.

An 8-pin modular keyed jack for dial (PSTN) lines or 2-wire leased lines.

A 25-pin DB-25-S receptacle for DTE interface.

DTE Connection

Procedure

To connect the EIA-232-D cable and ferrite choke from the modem to the DTE:

1. Make sure the modem’s rear panel power switch is Off.

2. Connect the DB-25-P (plug) connector on the cable to the DB-25-S (socket)

connector labeled DTE on the modem’s rear panel. Use a small screwdriver to

fasten the cable to the modem.

3. Connect the DB-25-P connector on the cable to the DB-25-S connector on the

DTE. Use a small screwdriver to fasten the cable to the DTE.

To ensure compliance with FCC Part 15 Regulations, a ferrite choke must be installed

on the DTE (EIA-232-D interface) cable.

Procedure

To install the ferrite choke on the DTE cable:

1. Open the ferrite choke, place it around the DTE cable as close as possible to the

connector attached to the modem, and snap the ferrite choke shut.

2. Install a cable tie behind the ferrite choke to prevent it from sliding along the cable.

Dial-Line Connection

Procedure

To connect a Model 3830 to the dial network interface:

1. Insert the 6-position, 4-conductor modular plug into the jack labeled LINE.

2. Insert the other end of the modular cord into the dial network interface.

2-Wire Leased-Line Connection

Procedure

For 2-wire leased line connection to a JM8 network interface, refer to Appendix C,

Assignments

, in the User’s Guide. To connect a Model 3830 modem to the 6-pin,

center pair, leased-line network interface:

1. Insert the 6-position, 4-conductor modular plug into the jack labeled LINE.

2. Insert the other end of the modular cord into the leased-line network interface.

Telephone Connection

Procedure

To connect the modem to a telephone:

1. Insert the 6-position, 4-conductor modular plug into the jack labeled PHONE.

2. Insert the other end of the modular cord into the telephone.

AC Power Transformer Connection

Procedure

To connect the modem to an ac power outlet:

1. Make sure the modem’s power switch is in the Off position.

2. Insert the power transformer’s 5-pin DIN male connector into the modem’s rear

panel ac power receptacle.

3. For the 115V power transformer, insert the power transformer into a grounded ac

power outlet.

For the 220–240V power transformer, insert the line cord’s outlet connector into the

power transformer’s IEC 320 power outlet. Next, insert the line cord wall plug into

the appropriate grounded ac outlet.

To ensure compliance with FCC Part 15 Regulations, a ferrite choke must be installed

on the power transformer cable.

Procedure

To install a ferrite choke on the power transformer cable:

1. Open the ferrite choke, place it around the power transformer cable as close as

possible to the connector attached to the modem, and snap the ferrite choke shut.

2. Install a cable tie behind the ferrite choke to prevent it from sliding along the cable.

Communications Software Installation

A personal computer commands and controls a dial modem through communications

software. This software, which is installed on the PC, uses the AT command set to

send instructions to the modem.

The Model 3830 can be used with any standard communications software. Many of the

following procedures require that your communications software be running so you can

pass commands to the modem.

Modem Power-Up

Once your modem is properly connected to the DTE, dial or leased lines, and ac outlet,

press the modem’s rear panel power switch to the ON position. The modem begins a

power-up self-test in which all front panel LEDs momentarily light (note that this also

occurs on a reset of the modem), and the Power LED remains ON. The state of other

LEDs depends on your modem’s configuration.

On initial power-up, the modem is in Command mode. To verify that the modem is

connected and functioning properly, enter the following:

Type: AT

Press: Enter

The screen displays OK.

Selecting Factory Configuration Options

After the modem passes the power-up self-test, it can be configured for operation using

one of two factory preset configurations.

These factory preset templates contain the most commonly used configuration options

(straps) for Asynchronous Dial and UNIX hardware network configurations. Your

modem is shipped from the factory with the Async Dial default configuration options

stored in memory. If UNIX Dial is more appropriate for your configuration, then you

must change the factory setting as described as follows.

NOTE:

If you have already changed certain configuration options, you may have lost AT

command control. For example, operating in Synchronous mode or disabling AT

commands results in an inability to change configuration options. To regain AT

command control, refer to

Recovering AT Commands

for these procedures.

Procedure

To change a factory template:

1. Use the AT&F&W command to load the appropriate factory configuration to the

appropriate storage area. Enter the following:

Type: AT&F

where:

is one of the following factory configurations:

0 = Async Dial

3 = UNIX Dial

5 = Cellular (Mobile) (Valid only if ETC is installed)

6 = Cellular (PSTN) (Valid only if ETC is installed)

where:

is one of the following configuration areas:

0 = Active (Saved)

1 = Customer 1

2 = Customer 2

NOTE:

These three configuration areas are nonvolatile memory locations. Active (Saved)

contains the most recently saved changes to any configuration options. In the

event of power loss, the modem retrieves these configuration options. Customer 1

and Customer 2 are user-defined configuration areas.

2. Press Enter. The selected factory configuration is saved.

NOTE:

When configuring your modem, keep a record of its configuration options as a

future reference in case the modem must be replaced.

Recovering AT Commands

AT commands are issued from asynchronous terminals and personal computers.

Certain dialing methods, such as V.25bis and synchronous operation, disable the use

of AT commands and place the modem into a state known as Dumb mode. The

Model 3830 is capable of normal operation when in Dumb mode. However, if the setting

of a configuration option must be changed, it can only be accomplished using an AT

command.

The AT Recovery command (AT***) places the modem into a temporary state that

restores AT commands. When in this state, the modem’s previous settings are retained

except for the following configuration options:

HThe DTE Dialer Type configuration option (&M and &Q) is set to AT

HThe Async/Sync Mode configuration option (&M and &Q) is set to Async

HThe DSR Control configuration option (&S) is set to Forced On

HThe LSD Control configuration option (&C) is set to Forced On

If these settings are not appropriate, then change them to a setting compatible with

your current application.

The procedures for an AT recovery using an asynchronous terminal or personal

computer are listed in the following section. Read through these procedures before

performing a recovery:

"Procedure

1. Turn the modem Off and then ON. The modem performs a power-up self-test in

which all LEDs light. While this is running, repeatedly press the A key of your

DTE’s keyboard (or keep the key depressed if your keyboard automatically repeats

characters that way). Keep doing this until A’s (or a’s) appear on your DTE screen.

(You may use all uppercase or all lowercase characters.)

At least three consecutive A’s must be entered within a 2-second time interval.

If these characters are not echoed back to the DTE screen after the power-up

self-test is complete, then the modem is still in Dumb mode and maintains its

current configuration. Turn the modem Off and then ON again, and repeat Step 1.

2. Once the characters are echoed back to the DTE,

Type: T***

(The case of this character must be consistent with the case used in Step 1. Mixed

case prefixes such as aT or At are not recognized.)

This must be entered within 10 seconds after receiving the echoed characters.

Press: Enter

The screen displays OK.

The modem is now in AT Recovery mode, and remains in this state until a Save or

power reset occurs. While in this mode, you can use AT commands to make any

necessary changes to configuration options.

Keep in mind that the &C command is changed to Forced On (&C0), the &M and

&Q commands are changed to Async mode with AT commands enabled (&M0 and

&Q0), and the &S command is changed to Forced On (&S0). If these settings are

not appropriate, then reset them to a desired choice before exiting AT Recovery

mode.

3. To save changes, use the &W command:

Type: AT&W

where:

is one of the following configuration areas:

0 = Active (Saved)

1 = Customer 1

2 = Customer 2

Press: Enter

The modem exits AT Recovery mode and returns to its previous application

environment.

Initialization Strings

An initialization string contains several AT commands that are entered at once to

program the modem for a specific application. The factory default configuration options

are suitable for most applications.

The following initialization strings identify essential AT commands that directly impact

modem operation for a particular application. Replace the characters

with a value

suitable for your environment. If you need to further modify these strings for your

application, make sure additional commands are inserted somewhere in the middle of

the initialization string. Whenever an &L command is used, it must appear at the end of

an initialization string.

Table 1. Initialization Strings for Special Applications

Application Initialization String

V.25bis HDLC AT&F &D1 &S1 &M234 &W

V.25bis Bisynchronous AT&F &D1 &S1 &M233 &W

Synchronous Leased

Line AT&F &D1 &S1 S44=

S45=

S82=

&M1 &L

AT&T Exclusive

Dialing for DATAKITAT&F &C5 &D1 &S3 &R0 \D3 \Q1 \G1 S85=1 &M235 &W

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