ZyXEL Communications COMET 336 User manual

Comet 336

User’s Manual

March 97

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Limited Warranty

ZyXEL warrants to the original end user (purchaser) that this product is free from any defects in

materials or workmanship for a period of up to two (2) years from the date of purchase. During

the warranty period, and upon proof of purchase, should the product have indications of failure

due to faulty workmanship and/or materials, ZyXEL will, at its option, repair or replace the

defective products or components without charge for either parts or labor, and to whatever

extent it shall deem necessary to restore the product or components to proper operating

condition. Any replacement will consist of a new or remanufactured functionally equivalent

product of equal value, and will be solely at the option of ZyXEL. This warranty shall not apply

if the product is modified, misused, tampered with, damaged by an act of God, or subjected to

abnormal working conditions.

Note: Repair or replacement, as provided under this warranty, is the exclusive remedy of the

purchaser. This warranty is in lieu of all other warranties, express or implied, including any

implied warranty of merchantability or fitness for a particular use or purpose. ZyXEL shall in no

event be held liable for indirect or consequential damages of any kind or character to the

purchaser.

Acknowledgments

The trademarks and brand names mentioned in this manual are used for plain informational

purposes. Trademarks and brand names are the property of their respective owners.

FCC Part 15 Information

This device complies with Part 15 of FCC rules. Operation is subject to the following two

conditions:

1. This device may not cause harmful interference.

2. This device must accept any interference received, including interference that may cause

undesired operations.

This equipment has been tested and found to comply with the limits for a CLASS B digital

device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable

protection against harmful interference in a residential installation. This equipment generates,

uses, and can radiate radio frequency energy, and if not installed and used in accordance with

the instructions, may cause harmful interference to radio communications. However, there is no

guarantee that interference will not occur in a particular installation.

If this equipment does cause harmful interference to radio/television reception, which can be

determined by turning the equipment off and on, the user is encouraged to try to correct the

interference by one or more of the following measures:

•Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and the receiver.

•Connect the equipment into an outlet on a circuit different from that to which the receiver

is connected.

•Consult the dealer or an experienced radio/TV technician for help.

iii

Changes or modifications not expressly approved by the party responsible for compliance could

void the user’s authority to operate the equipment. Shielded RS-232 cables are required to be

used to ensure compliance with FCC Part 15, and it is the responsibility of the user to provide

and use shielded RS-232 cables.

FCC Requirements

This equipment complies with Part 68 of the FCC Rules. On the base unit of this equipment is a

label that contains, among other information, the FCC Registration Number and the Ringer

Equivalence Number (REN) for this equipment.

IF REQUESTED, THIS INFORMATION MUST BE GIVEN TO THE TELEPHONE

COMPANY.

The REN is useful to determine the quantity of the devices you may connect to your telephone

line and still have all of those devices ring when your telephone number is called. In most, but

not all areas, the sum of the RENs of all devices connected to one line should not exceed five

(5.0). To be certain of the number of devices you may connect to your line, as determined by

the total RENs, you should contact your local telephone company to determine the maximum

REN for your calling area.

If your equipment causes harm to the telephone network, the telephone company may

discontinue your service temporarily. If possible, they will notify you in advance. But if advance

notice isn’t practical, you will be notified as soon as possible. You will be informed of your right

to file a complaint with the FCC.

Your telephone company may make changes in its facilities, equipment, operations, or

procedures that could affect the proper functioning of your equipment. If they do, you will be

notified in advance to give you an opportunity to maintain uninterrupted telephone service.

If you experience trouble with this telephone equipment, please contact the Address and Phone

number listed in the warranty card for information on obtaining service or repairs.

The telephone company may ask that you disconnect this equipment from the network until the

problem has been corrected or until you are sure the equipment is not malfunctioning.

The user is not authorized to repair or modify the equipment.

This equipment may not be used on coin service provided by the telephone company.

Connection to party lines is subject to state tariffs.

You will find also this information on a sticker on the bottom of the modems case.

The modem is connected to a public switched line using a USOC (Universal Service Order

Code) RJ-11C modular jack.

Contacting ZyXEL

If you have questions about your ZyXEL product or desire assistance, contact ZyXEL

Communications Corporation in one of the following ways:

• Phone: In North America call between 8:00 AM and 5:00 PM PST at

(714) 693-0808.

Outside North America, you can dial +886-3-5783942 EXT 252 between 8:00AM

and 5:00PM Taiwan time (GMT +8:00).

• Fax: ZyXEL in North America: (714) 693-8811 or Taiwan: +886-3-5782439.

• E-mail:

• Sales inquiries: [email protected] in North America.

[email protected] outside North America.

• Technical support: [email protected] in North America.

[email protected] outside North America.

• Product information: Visit our site on the World Wide Web:

http://www.zyxel.com.

• FTP: Information , such as ZyXEL software and ROM updates for North America

can be found at this FTP address: ftp.zyxel.com

For European versions and related files, use the address: ftp.zyxel.co.at

• Postal Service: You can send written communications at the following address:

ZyXEL Communications Corporation

6, Innovation Road II, Science-Based Industrial Park

Hsinchu, Taiwan 300, ROC

ZyXEL Communications Inc.

4920 E. La Palma Avenue

Anaheim, CA92807, USA

Table of Contents

Limited Warranty ii

FCC Part 15 Information ii

FCC Requirements iii

Contacting ZyXEL iii

1 Introduction 1

Unpacking Your Modem 1

Becoming a Registered Owner 1

2 Installation 3

Optional Steps for Comet 336 Installation 3

Telephone Jack 4

Microphone 4

Speaker 4

Driver and Software Installation 4

Windows 95 Driver Installation 4

Windows 95 Dial-up Networking 6

Setup for DOS Fax/Modem Software 11

3 Basic Modem Operation 14

Understanding AT Commands 14

Using the Windows 95 Hyper Terminal Program 14

Dialing and Answering Techniques 15

Dialing using the ATD Command 15

Auto-Answer and Hook Controls 16

Making Your First Connection 16

Quick Tips when issuing AT Commands 16

Modem Result Codes 18

Viewing S Register Values 18

Changing S Register Values 18

Non-Volatile Memory 18

Storing Phone Numbers 19

Dialing Stored Phone Numbers 19

Saving Settings and User Profiles 19

Helpful Hints for PC Computers 19

Default Modem Settings for PC’s 20

4 Advanced Data Communications 22

Front Panel LEDs 22

DTE Interface 22

Synchronous and Asynchronous Communications 22

UART 23

Serial Port 23

Serial RS-232C Cable 23

Communication Protocols and Speeds 23

Universal Protocol Compatibility 24

Error Control 24

CRC (Cyclical Redundancy Check) Error Detection 25

Data Compression 25

Run Length Encoding 25

Adaptive Frequency Encoding 25

String Coding 25

Hardware or Software Flow Control 26

Hardware CTS/RTS 26

Software XON/XOFF 26

5 Special Functions 27

Caller Number Delivery (Caller ID) 27

Caller ID Result Codes 27

Caller ID Inquiries 27

Caller ID Formatted Form Reporting 27

Distinctive Ring 28

6 AT Command Set Summaries 30

vii

Basic AT Command Set 30

Extended AT& Command Set 31

Extended AT* Command Set 33

7 Status Registers & Result Codes 36

S-Registers "ATSn=x" 36

S-Register Definitions 36

Result Code Options 39

"ATXn" Result Code Option Table 39

Result Code Field Descriptions 40

8 Fax Operation 42

Modem as Fax Machine 42

ITU-T T.30 Fax Protocol 42

Fax Command sets 42

Defining the Fax Command Sets 43

Flow Control 43

FAX Class 1 AT Command Set 43

FAX Class 2 AT Command Set 44

9 Voice Operation 48

Voice AT Command Set 60

Introduction 1

1 Introduction

Congratulations on the purchase of your Comet 336 modem - one of ZyXEL's premier

high-performance products. The Comet 336 is world renown for its ability to maintain

ultra high speeds and clear, quality connections while communicating around the globe.

Unpacking Your Modem

Before you proceed further, please check all items you received with your modem

against this list to make sure nothing is missing. The complete package should include:

• One (1) Comet 336 modem

• One (1) AC power adapter (external model)

• One (1) RJ-11 modular telephone cable

• One (1) Comet 336 User’s Manual

• One (1) ZyXEL modem driver diskette with Windows 95 INF file

• One (1) Data/Fax software for Windows environments

• One (1) warranty/registration card

• One (1) Zy CD

• One (1) standard RS-232 cable

Contact your dealer or the store where you bought the modem if anything is missing.

Check the modem for shipping damages. If you find any damage, contact the shipping

agency immediately.

Retain shipping and packaging materials for future storage or shipping needs.

Becoming a Registered Owner

Complete the pre-addressed Warranty Registration Card and place it in the mail.

Registered owners will receive future product information and update announcements.

Warranty registration is not necessary for product repair/or replacement - please also

save your dated invoice as proof of purchase.

2 Introduction

Installation 3

2 Installation

This chapter covers the steps required to install your modem and install and configure

the Windows 95 driver.

1. Turn off your computer.

2. Open the rear panel on the back of your modem.

3. Connect the power adapter. Plug one end of the power adapter to the round

POWER JACK on the back of the modem. Plug the other end to an AC wall outlet.

You can leave the power adapter plugged in when you are not using the modem. To

prevent power surges from damaging your modem and computer, it is recommended

that you connect the power adapter to a surge protector.

4. Connect the serial cable. Plug one end of the serial cable into the SERIAL PORT

connector on the back of the modem. Plug the other end of the serial cable to the

back of your computer. Your Comet 336 comes with a high-speed serial interface

capable of reaching DTE speeds of 115.2Kbps. Be sure that your PC serial port has

a high-speed 16550 compatible Universal Asynchronous Receiver Transmitter

(UART).

5. Connect the telephone cord. Plug one end of the supplied telephone (RJ-11) cord

into the LINE jack on the back of the modem. Plug the other end into a telephone

wall jack, just as you would a standard telephone.

6. Turn the Comet 336 on by raising the blue power switch. The PWR LED should

come on and the modem performs a self-test procedure.

7. Turn the computer back on.

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Optional Steps for Comet 336 Installation

The Comet 336 is equipped with a telephone jack and speaker and microphone jacks on

the back panel. The following sections briefly describe how to take advantage of these

features.

Table of contents

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