ZyXEL Communications Omni TA128 User manual

Omni TA128
User’s Manual
Version 2.0
ZyXEL
ACCESSING INTERNET & INTRANET

ii
ZyXEL 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 discretion, 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 re-manufactured functionally
equivalent product of equal value, and will be solely at the
discretion 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.
To obtain the services of this warranty, please contact ZyXEL’s
Service Center, refer to the separate Warranty Card for your Return
Material Authorization number (RMA). Products must be returned
Postage Prepaid. It is recommended that the unit be insured when
shipped. Any returned products without proof of purchase or those
with an out-dated warranty will be repaired or replaced (at the
discretion of ZyXEL) and the customer will be billed for parts and
labor. All repaired or replaced products will be shipped by ZyXEL
to the corresponding return address, Postage Paid (USA and
territories only). If the customer desires some other return
destination beyond the U.S. borders, the customer shall bear the
cost of the return shipment. This warranty gives you specific legal

iii
rights, and you may also have other rights which vary from state to
state.
Copyright © 1997 by ZyXEL
The contents of this book may not be reproduced (in any part or as
a whole) or transmitted in any form or by any means without the
written permission of the publisher.
Published by ZyXEL Communications Corporation. All rights
reserved.
Note: ZyXEL does not assume any liability arising out of the
application or use of any products, or software described herein.
Neither does it convey any license under its patent rights nor the
patents rights of others. ZyXEL further reserves the right to make
changes in any products described herein without notice. This
document is subject to change without notice.
Acknowledgments
Trademarks mentioned in this manual are used for informational
purposes only.
Trademarks are properties 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 commercial environment. This
equipment generates, uses, and can radiate radio frequency energy,

iv
and if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
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.
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.
The declarations of CE marking:
The TA128 has been approved for connection to the Public
Switched Telecommunication Network using interfaces compatible
with ITU-TSS recommendation I.420 (Basic Rate ISDN user
access). The TA128 complies with the following directives:

v
1. The Council Directive 89/336/EEC of 3 May 1992 on the
approximation of the laws of the Member States relation to
Electro Magnetic Compatibility. (EMC Directive)
2. Council Directive 91/263/EEC of 29 April 1991 on the
approximation of the laws of the Member States concerning
telecommunication terminal equipment. (The Telecom
Terminal Equipment Directive)
3. 93/68/EEC of 22 July 1993 amending the Directives
89/336/EEC, 91/263 /EEC and 92/31/EEC.(Marking Directive)
4. Council Directive 73/23/EEC and 93/68/EEC of 26 Dec 1996 on
the harmonization of the laws of the Member States relation to
electrical equipment designed for use within certain voltage
limits.
5. The Council Directive 92/31/EEC of 28 April 1992 amending
directive on the approximation of the laws of the member states
relating to Electro Magnetic Compatibility.
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 [phone]
Outside North America, you can dial [phone] EXT 252
between 8:00AM and 5:00PM Taiwan time (GMT +8:00).
•Fax: ZyXEL in North America: [phone] or Taiwan:
[phone]
•E-mail:
•Sales inquiries: [email protected] in North America
[email protected] outside North America.

vi
•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, R.O.C.
or
ZyXEL Communications Inc.
4920 E. La Palma Avenue
Anaheim, CA92807, U.S.A.

vii
Table of Contents
ZyXEL Limited Warranty...........................................................ii
FCC Part 15 Information............................................................iii
Contacting ZyXEL.......................................................................v
1 Introduction ......................................................................1
Key Features of the TA128..........................................................2
Speed and Compatibility.............................................................2
Intelligent Features.......................................................................2
Technical Specifications..............................................................3
Physical Characteristics...............................................................3
U-Interface Option.......................................................................4
Unpacking Your TA128...............................................................4
How to Become a Registered Owner...........................................4
2 Installing your TA128 .......................................................5
Back Panel of the TA128..............................................................5
Connecting Your TA128 to the Power Supply..........................6
Connecting the TA128 to Your Computer.................................6
Connecting the TA128 to your Computer Serial Port...............7
Connecting the TA128 to Your ISDN Line................................8
U Interface Model........................................................................8
S/T Interface.................................................................................9
Power On and Self Diagnostics...................................................9
TA128 Front Panel......................................................................10
The LED Indicators....................................................................10
Front Panel Switch.....................................................................11
3 Configuring Your ISDN Line and Network....................13
Configuring Your TA using a Configuration Utility..............13

viii
Configuring your TA using a Terminal program...................14
4 ISDN Communication Basics ........................................17
Understanding AT Commands.................................................17
Supported AT command types:................................................18
Quick Tips when issuing AT commands:.................................18
Outgoing Calls .............................................................................19
Dialing out using ISDN mode...................................................19
Dialing out using ISDN mode’s optional Speech Bearer Service
.....................................................................................................19
Dialing out for Analog Adapter Port 1......................................20
Dialing out for Analog Adapter Port 2......................................20
Manually switching communication modes ............................20
Placing the Call...........................................................................21
Incoming Calls.............................................................................21
Digital Data.................................................................................22
Determining the Packet Length.................................................22
Answering a Call using MSN....................................................23
Data over Speech Channel........................................................24
Best-effort call answering..........................................................25
Ambiguity resolution switch for voice calls.............................25
Multi auto-answering of data calls............................................26
5 Setup for Windows 95 and NT 4.0.................................27
Installing the Windows 95 Driver (INF file)...........................27
Configuring Windows 95 Dial-Up Networking.......................31
CAPI Installation.........................................................................35
6 Point-to-Point Protocol (PPP)........................................37
Introduction..................................................................................37
Feature list....................................................................................38
Async to Sync Conversion........................................................38
Authentication conversion ........................................................39
Compression Control Protocol (CCP)......................................40

ix
Multilink PPP .............................................................................40
Call bumping..............................................................................41
Bandwidth On Demand (BOD) ................................................42
BACP/BAP.................................................................................42
7 V.110 and Synchronous Mode Communications.........45
Answering a V.110 call...............................................................45
Making V.110 Calls.....................................................................46
Synchronous Connections..........................................................46
V.25bis Command Set...............................................................47
DTR Drop-Dialing Operation....................................................48
8 V.120 ISDN Communications.........................................51
Placing outgoing calls.................................................................51
Configuring the V.120 mode.....................................................52
Dialing in V.120 mode...............................................................53
Answering incoming calls..........................................................53
Speeds of 128Kbps......................................................................54
Identifying your line provisioning.............................................54
Making a Bundled Call with V.120...........................................54
Dialing pre-stored phone numbers ...........................................55
Error Correction and Data Compression with V.120............56
Bundle Connection with V.42bis Data Compression..............57
Selecting V.120 for European ISDN (DSS1) ...........................57
Selecting V.120 for Germany National ISDN (1TR6)............58
9 X.75 ISDN Communications (Europe)...........................59
Answering an X.75 call...............................................................60
Making an X.75 Call ...................................................................60
Making a Bundled Call with X.75.............................................61
Dialing Pre-stored Phone Numbers..........................................62
Invoking V.42bis Data Compression .......................................62
Bundle Connection with V.42bis Data Compression..............63

x
10 Handling Analog Calls .................................................65
Placing a Call from the Analog Adapter..................................66
Accepting an Incoming Call.......................................................67
Feature Phone..............................................................................69
The Flash key.............................................................................69
InterCom ....................................................................................70
Call Waiting................................................................................70
Placing a second call..................................................................70
Receiving a second call..............................................................70
Call Broker..................................................................................71
Call Reject..................................................................................71
Call Transfer...............................................................................72
Three-way Conference Call.......................................................72
11 Advanced ISDN Call Control .......................................74
Call Control for DSS1 (Digital Subscriber Signaling #1)......74
Control of Outgoing Service Indicator .....................................74
Control of ISDN Phone Number and Sub-address.................76
Call Control for 1TR6 (Old German ISDN)............................77
Control of Outgoing Service Indicator .....................................78
Control of ENDGERÄTEAUSWAHLZIFFER (EAZ)............78
Answering a Call .........................................................................80
Answering a Call for DSS1 .......................................................80
Answering a Call for 1TR6........................................................81
Best-effort Call Answering........................................................82
Ambiguity Resolution Switch for Voice Calls.........................82
Multi-Auto-Answering of Data Calls........................................82
Data Call Indication...................................................................83
Disable inbound call connection...............................................84
Point-to-Point Configuration.....................................................84
Placing a Call................................................................................84
Placing a call for DSS1 ..............................................................85
Placing a call for 1TR6...............................................................86