3Com 005689-03 Manual de instalação - Página 2

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Troubleshooting

Problem: The computer or software will not recognize or fails to initialize the

modem.

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Make sure the modem is plugged in to both the power adapter and the serial

cable and turned on. Use only the power adapter included with the modem. The

CS and TR lights on the front panel should be illuminated.

Possible Solution:

If you have another modem installed in your computer, you may need to

uninstall it before using your new 3Com modem.

Possible Solution:

Verify that your communications software is set to use the port to which your

modem is attached, either the Printer or Modem port. If this is not the case,

either change the setting in your software or physically change your

modem's connection to your Macintosh. Refer to your software manual for

information about changing modem settings.

Problem: The modem won't go off hook to dial or doesn't answer the phone.

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You may have plugged your modem's phone cord into the wrong jack on the

modem. Make sure the phone cord is plugged into a jack labeled with the word

TELCO (marked with

on the underside of your modem).

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You might have a bad phone cord connection to your modem. The phone cord

should be plugged into the TELCO jack on the modem (marked with

wall phone jack. The phone cord should be no longer than 12 feet in length. Use the

phone cord included in your modem's box if possible.

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You may have devices between the modem and the phone jack. There should be

no line splitters, fax machines, or other devices between the modem and the wall

jack.

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You may have a poor line connection. Place the call again. Calls are routed differ-

ently each time. To verify a valid phone connection, enter your communication

software's terminal mode and dial the 3Com BBS: ATX3DT18472626000

If you must dial a number (such as "9") to reach an outside line, type that number

right after A A A A A T T T T T X X X X X 3 3 3 3 3 DT

DT .

This string bypasses the dial tone, allowing a connection if the modem is function-

ing properly.

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You may have plugged your modem's phone cord into a digital line. Plugging your

modem's phone cord into a digital phone line can damage the modem. Call your

phone company if you are unsure whether or not your phone line is digital.

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You may be using the wrong power adapter for your modem. Use only the power

adapter that came with your modem.

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Your software may not have auto answer enabled. Enable the auto answer feature.

In your communication software's terminal mode, type A A A A A T T T T T S S S S S =1

=1 (ATS "zero"=1) and

ENTER

ENTER.

press ENTER

ENTER

You need to enable auto answer before every session unless you alter your soft-

ware's initialization string to permanently enable auto answer.

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If you have voice mail, your dial tone may be altered because messages are

waiting. Answer your voice mail to restore your normal dial tone.

Problem: Both modems sound like they exchange carrier signals, but they fail to

establish a connection.

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You may have a poor line connection. Place the call again. Calls are routed differ-

ently each time.

To verify a valid phone connection, enter your communication software's terminal

mode and dial the 3Com BBS: ATX3DT18472626000

If you must dial a number (such as "9") to reach an outside line, type that number

right after A A A A A T T T T T X X X X X 3 3 3 3 3 DT

DT .

This string bypasses the dial tone, allowing a connection if the modem is function-

ing properly.

_________________________________________________________________________________________________________

Problem: Your 56K modem cannot achieve a 56K Internet connection.

______________________________________________________________________________________________

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V.90 supports speeds of up to 56K. Due to phone line restrictions, actual speeds

will vary; this does not mean you have not achieved a V.90 connection. Our

research shows that the vast majority of telephone lines in North America support

V.90 connections. However, due to unusual or old telephone line configurations,

some users will not be able to take full advantage of this technology. If this is the

case, your 3Com modem will use its backward compatibility to negotiate a speed

compatible with your phone line, such as V.34.

It is important to remember that your line conditions may change, so you may be

able to make faster connections in the future. To make sure that you can use V.90

or 3Com 56K technology, perform the following tests:

First, make sure your modem supports V.90. You can verify that your

modem supports V.90 by opening a terminal application

(RapidComm TM ), typing ati7, and pressing ENTER. If the Options line

has V.90 listed, then your modem supports V.90 and 3Com 56K

technology.

2. Make sure that the number you're dialing is an actual V.90 or 3Com 56K

technology server. Some ISPs may have a mixture of V.90 and non-V.90

servers. You can check this by contacting your ISP and asking them about

56K technology or V.90 availability.

3. If it is a V.90 or 3Com 56K server, you may want to try calling it a few

more times. Remember, the phone company routes each call differently.

For testing purposes, you may want to call into the 3Com BBS at 847 262

6000, which has V.90 servers attached to it.

4. If you are able to connect at V.90 speeds on the 3Com BBS, there may be

something between you and your ISP that is preventing a V.90 connection

) and the

from being negotiated. Contact your ISP and see if they have received

similar reports from other customers.

If you do not make a V.90 connection to our BBS, your phone line might

not be capable of supporting V.90 or 3Com 56K technology speeds. If you

are experiencing consistent problems with V.90 connections (i.e., not

making a high speed connection, abrupt disconnections, etc.), you can call

3Com Technical Support for U.S. Robotics modems at 847 262 5151.

Support Resources

If you have not fixed a problem after trying the suggestions in the

"Troubleshooting" section, you can receive additional help via one of these

convenient resources:

World Wide Web

Provides the same information as the Internet on Demand listing. Log on to

www.usr.com/home/online

Internet On Demand

Provides automatic technical support through a library containing product

information, quick reference cards, and installation help.

• To obtain an index of available documents, send a blank e-mail

to suppor

suppor

[email protected]

[email protected].

[email protected]

• To have a document e-mailed to you, send the document's

number as the subject.

Internet FTP

Provides a free library containing the same files as the BBS site. FTP to

ftp.usr.com.

ftp.usr.com

The 3Com BBS

Gives you access to customer and technical support documents and hundreds

of files and tips to help simplify using your modem. To connect to the 3Com

Bulletin Board System, follow these steps:

1. Start your fax/data communications software. The software

settings for the BBS are:

• ANSI terminal emulation

• Data Bits: 8

• Parity: None

• Stop Bits: 1

2. Put the software in terminal mode.

3. Type the BBS's number: ATX3DT18472626000

If this is your first time connecting to our BBS, you will be asked to enter your

name, create a password of your choice, and to fill out a questionnaire.

When you are ready to leave the BBS, type G (for "good-bye") from the main

menu.

America Online

Provides resources such as file libraries, message boards, online customer

support, and product announcements. In the Keyword field, type 3COM

CompuServe

Provides resources such as file libraries, message boards, online customer

support, and product announcements.

• Go to this address: GO THREE

GO THREE

GO THREECO

COM M M M M

• Address private messages to 76711,707

76711,707

Are You Still Having Problems?

1. Call the Dealer Who Sold You the Modem

The dealer may be able to troubleshoot the problem over the phone or may

request that you bring the modem back to the store for service.

2. Call 3Com's Technical Support Department

In the United States:

847 262 5151

8:00 - 6:00 CST M-F

In Canada:

905 479 0231

8:30 - 6:00 EST

Manufacturer's Declaration of Conformity

3Com Corporation

3800 Golf Road

Rolling Meadows, IL 60008

U.S.A.

declares that this product conforms to the FCC's specifications:

Part 15:

Operation is subject to the following two conditions:

(1) this device may not cause harmful electromagnetic interference, and

(2) this device must accept any interference received including interference that may cause

undesired operations.

Part 68:

This equipment complies with FCC Rules Part 68. Located on the bottom of the modem is the

FCC Registration Number and Ringer Equivalence Number (REN). You must provide this

information to the telephone company if requested.

The REN is used to determine the number of devices you may legally connect to your tele-

phone line. In most areas, the sum of the REN of all devices connected to one line must not

exceed five (5.0). You should contact your telephone company to determine the maximum REN

for your calling area.

This equipment uses the following USOC jacks: RJ-11C.

An FCC compliant telephone cord and modular plug are provided with this equipment, which is

designed to connect to the telephone network or premises wiring using a Part 68 compliant

compatible jack. See installation instructions for details.

Caution to the User

The user is cautioned that any changes or modifications not expressly approved by the party

responsible for compliance could void the user's authority to operate the equipment.

Industry Canada (IC)

This digital apparatus does not exceed the Class B limits for radio noise emissions from digital

apparatus set out in the interference-causing equipment standard entitled Digital Apparatus ,

ICES-003 of Industry Canada.

Cet appareil numérique respecte les limites de bruits radioélectriques applicables aux

appareils numériques de Classe B préscrites dans la norme sur le matériel brouilleur:

Appareils Numériques, NMB-003 édictée par l'Industrie Canada.

UL Listing/CSA Certified

This information technology equipment is UL-Listed and CSA Certified for the uses described in

the Users Guide .

Fax Branding

The Telephone Consumer Protection Act of 1991 makes it unlawful for any person to

use a computer or other electronic device, including fax machines, to send any mes-

sage unless such message clearly contains in the margin at the top or bottom of each

transmitted page or on the first page of the transmission, the date and time it is sent, an

identification of the business or other entity, or other individual sending the message,

and the telephone number of the sending machine or of such business, other entity, or

individual. (The telephone number provided may not be a 900 number or any other

number for which charges exceed local or long-distance transmission charges.)

In order to program this information into your modem, refer to the RapidComm manual

on the CD-ROM that shipped with your modem. If you are using a different communica-

tion software program, refer to its manual.

Radio and Television Interference

This equipment generates and uses radio frequency energy and if not installed and used

properly, in strict accordance with the manufacturer's instructions, may cause interference to

radio and television reception. The modem has been tested and found to comply with the limits

for a Class B computing device in accordance with the specifications in Part 15 of FCC rules,

which are designed to provide reasonable protection against such interference in a residential

3COM

3COM.

3COM

installation. This equipment generates, uses, and can radiate radio frequency energy and, if not

installed and used in accordance with the instructions, may cause interference to radio and

television communications.

However, there is no guarantee that interference will not occur in a particular installation. If this device

does cause interference to radio or television reception, which you can determine by monitoring

reception when the modem is installed and when it is removed from the computer, try to correct the

problem with one or more of the following measures:

Reorient the receiving antenna (for televisions with antenna reception only) or cable input device.

Relocate the computer with respect to the receiver.

Relocate the computer and/or the receiver so that they are on separate branch circuits.

If necessary, consult your dealer or an experienced radio/television technician for additional

suggestions. You may find the following booklet, prepared by the Federal Communications

Commission, helpful:

How to Identify and Resolve Radio-TV Interference Problems

Stock No. 004-000-0345-4

U.S. Government Printing Office

Washington, DC 20402

In accordance with Part 15 of the FCC rules, the user is cautioned that any changes or modifications to

the equipment described in this manual that are not expressly approved by 3Com could void the user's

authority to operate the equipment.

For Canadian Modem Users

NOTICE: The Industry Canada (IC) label identifies certified equipment. This certification means the

equipment meets certain telecommunications network protective, operational, and safety

requirements as prescribed in the appropriate Terminal Equipment Technical Requirements

document(s). The Department does not guarantee the equipment will operate to the user's satisfaction.

NOTICE: The Ringer Equivalence Number (REN) assigned to each terminal device provides an

indication of the maximum number of terminals allowed to be connected to a telephone interface. The

termination on an interface may consist of any combination of devices subject only to the requirement

that the sum of the Ringer Equivalence Numbers of all the devices does not exceed 5. Please see the

bottom of the modem for the REN.

Before installing this equipment, users should ensure that it is permissible to be connected to the

facilities of the local telecommunications company. The equipment must also be installed using an

acceptable method of connection. In some cases, the company's inside wiring associated with a single-

line, individual service may be extended by means of a certified connector assembly (telephone

extension cord.) The customer should be aware that compliance with the above conditions may not

prevent degradation of service in some situations. Currently, telecommunication companies do not

allow users to connect their equipment to jacks except in precise situations that are spelled out in

tariffing arrangements with those companies.

Repairs to certified equipment should be coordinated by a representative designated by the supplier.

Any repairs or alterations made by the user to this equipment, or equipment malfunctions, may give the

telecommunications company cause to request the user to disconnect the equipment.

For your own protection, make sure that the electrical ground connections of the power utility, telephone

lines, and internal metallic water pipe system, if present, are connected together. This precaution may

be particularly important in rural areas.

CAUTION: Do NOT attempt to make such connections yourself. Instead, contact an electric inspection

authority or electrician, as appropriate.

3Com Corporation Limited Warranty

3Com warrants this hardware product to be free from defects in workmanship and materials, under normal use and service, for the lifetime of the product from the date of

purchase from 3Com or its authorized reseller. 3Com's sole obligation under this express warranty shall be, at

3Com's option and expense, to repair the defective product or part, deliver to Customer an equivalent product or

part to replace the defective item, or if neither of the two foregoing options is reasonably available, 3Com may, in its

sole discretion, refund to Customer the purchase price paid for the defective product. All products that are replaced

will become the property of 3Com. Replacement products may be new or reconditioned. 3Com warrants any

replaced or repaired product or part for ninety (90) days from shipment, or the remainder of the initial warranty

period, whichever is longer.

YEAR 2000 WARRANTY: In addition to the Warranty stated above, 3Com warrants that each product sold or

licensed to Customer on and after January 1, 1998 that is date sensitive will continue performing properly with

regard to such date data on and after January 1, 2000, provided that all other products used by Customer in

connection or combination with the 3Com product, including hardware, software, and firmware, accurately

exchange date data with the 3Com product, with the exception of those products identified at 3Com's Web site,

http://www.3com.com/products/yr2000.html

as not meeting this standard. If it appears that any product that is stated to meet this standard does not perform

properly with regard to such date data on and after January 1, 2000, and Customer notifies 3Com before the later of

April 1, 2000, or ninety (90) days after purchase of the product from 3Com or its authorized reseller, 3Com shall, at

its option and expense, provide a software update which would effect the proper performance of such product,

repair such product, deliver to Customer an equivalent product to replace such product, or if none of the foregoing

is feasible, refund to Customer the purchase price paid for such product.

Any software update or replaced or repaired product will carry a Year 2000 Warranty for ninety (90) days after

purchase or until April 1, 2000, whichever is later.

OBTAINING WARRANTY SERVICE: Customer must contact a 3Com Corporate Service Center or an Authorized

3Com Service Center within the applicable warranty period to obtain warranty service authorization. Dated proof of

purchase from 3Com or its authorized reseller may be required. Products returned to 3Com's Corporate Service

Center must be pre-authorized by 3Com with a Service Repair Order (SRO) number marked on the outside of the

package, and sent prepaid and packaged appropriately for safe shipment, and it is recommended that they be

insured or sent by a method that provides for tracking of the package. The repaired or replaced item will be shipped

to Customer, at 3Com's expense, not later than thirty (30) days after 3Com receives the defective product. Return

the product to:

WARRANTY AND REPAIR SERVICE CENTER:

Keating Technologies

25 Royal Crest Court, Suite 200

Markham, ONT L3R 9X4

3Com shall not be responsible for any software, firmware, information, or memory data of Customer contained in,

stored on, or integrated with any products returned to 3Com for repair, whether under warranty or not.

WARRANTIES EXCLUSIVE: IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE,

CUSTOMER'S SOLE REMEDY FOR BREACH OF THAT WARRANTY SHALL BE REPAIR, REPLACEMENT,

OR REFUND OF THE PURCHASE PRICE PAID, AT 3COM'S OPTION. TO THE FULL EXTENT ALLOWED

BY LAW, THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL

OTHER WARRANTIES, TERMS, OR CONDITIONS, EXPRESS OR IMPLIED, EITHER IN FACT OR BY

OPERATION OF LAW, STATUTORY OR OTHERWISE, INCLUDING WARRANTIES, TERMS, OR

CONDITIONS OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, SATISFACTORY

QUALITY, CORRESPONDENCE WITH DESCRIPTION, AND NON-INFRINGEMENT, ALL OF WHICH ARE

EXPRESSLY DISCLAIMED. 3COM NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO

ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE, INSTALLATION,

MAINTENANCE OR USE OF ITS PRODUCTS.

3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE

THAT THE ALLEGED DEFECT OR MALFUNCTION IN THE PRODUCT DOES NOT EXIST OR WAS

CAUSED BY CUSTOMER'S OR ANY THIRD PERSON'S MISUSE, NEGLECT, IMPROPER INSTALLATION

OR TESTING, UNAUTHORIZED ATTEMPTS TO OPEN, REPAIR OR MODIFY THE PRODUCT, OR ANY

OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, LIGHTNING,

OTHER HAZARDS, OR ACTS OF GOD.

LIMITATION OF LIABILITY. TO THE FULL EXTENT ALLOWED BY LAW, 3COM ALSO EXCLUDES FOR

ITSELF AND ITS SUPPLIERS ANY LIABILITY, WHETHER BASED IN CONTRACT OR TORT (INCLUDING

NEGLIGENCE), FOR INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE DAMAGES OF

ANY KIND, OR FOR LOSS OF REVENUE OR PROFITS, LOSS OF BUSINESS, LOSS OF INFORMATION