Black Box IS300AE User Manual
CUSTOMER
SUPPORT
INFORMATION
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: info@blackbox.com
ISDN TA/V
ISDN TA/V
POWER
ISDN OK
SEND
RECEIVE
ANSWER
TERMINAL 1
TERMINAL 2
ON-LINE 1
ON-LINE 2
JANUARY 1995
IS300AE
3
FEDERAL COMMUNICATIONS COMMISSION
RADIO FREQUENCY INTERFERENCE STATEMENT
This equipment generates, uses, and can radiate radio frequency energy and if not
installed and used properly, that is, in strict accordance with the manufacturer’s
instructions, may cause interference to radio communication. It has been tested and
found to comply with the limits for a Class A computing device in accordance with
the specifications in Subpart B of Part 15 of FCC Rules, which are designed to provide
reasonable protection against such interference when the equipment is operated in a
commercial environment. Operation of this equipment in a residential area is likely to
cause interference, in which case the user at his own expense will be required to take
whatever measures may be required to correct the interference.
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
This digital apparatus does not exceed the Class A limits for Radio noise emission from
digital apparatus set out in the Radio Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de la classe A prescrites dans le Règlement sur le
brouillage radioélectrique édicté par Industrie Canada.
TRADEMARKS
All applied-for and registered trademarks are the property of their respective owners.
Apple
®
, Macintosh®, and Mac®are registered trademarks of Apple Computer, Inc.
UNIX
®
is a registered trademark of UNIX System Laboratories, Inc.
IBM
®
is a registered trademark of IBM Corporation.
MNP
®
is a registered trademark of Microcom Systems, Inc.
ARC
®
is a registered trademark of DATAPOINT CORPORATION.
Hayes
®
is a registered trademark of Zoom Telephonics, Inc.
VT100
™
is a trademark of Compaq Computer Corporation.
Microsoft
®
is a registered trademark of Microsoft Corporation.
Windows
™
is a trademark of Microsoft Corporation.
FCC/IC STATEMENTS
4
ISDN TA/V
Chapter Page
1. Specifications .............................................................................................9
2. Introduction ...............................................................................................10
2.1 Introducing Your New ISDN Terminal Adaptor.............................10
2.2 Before You Get Started .....................................................................11
2.3 Some Background Information About ISDN..................................13
2.4 A Brief Overview................................................................................14
2.5 Features of the ISDN TA/V..............................................................15
3. Installing ISDN TA/V Using the Intro Software....................................17
3.1 Overview.............................................................................................17
3.1.1 Quick Install ............................................................................17
3.2 About the Intro Program..................................................................17
3.3 Installing Intro Program Files on Your Hard Disk..........................18
3.4 Connecting Your ISDN TA/V ..........................................................18
3.5 Navigating through the Intro Screens .............................................19
3.6 Running Intro from DOS .................................................................19
3.7 Using Intro to Configure the ISDN TA/V.......................................19
4. ISDN TA/V Introduction for Non-Intro Users......................................20
4.1 Preparing for Installation .................................................................20
4.2 Connecting a Computer ...................................................................20
4.3 Connecting an Alternate DTE Device .............................................20
4.4 The CONTROL Port Connection ...................................................20
4.5 Your Communication Software ........................................................21
4.6 The Connecting Cable......................................................................21
4.7 ISDN Service Connection.................................................................21
4.8 Service Number of the Remote Device............................................21
4.9 Communication Settings ..................................................................22
5. Installing the ISDN TA/V Without Intro ...............................................23
5.1 Connecting Your ISDN TA/V ..........................................................23
5.2 Powering On the ISDN TA/V ..........................................................25
5.3 The Front Panel LCD and LEDs ......................................................26
5.4 Macintosh Computer Compatibility Requirements........................27
6. Installing and Configuring Your PC Communication Software ............29
6.1 Selecting Flow Control......................................................................29
6.2 Setting the Data Rate ........................................................................29
6.3 Specifying the Communications Format .........................................30
6.4 Specifying the Terminal Emulation.................................................30
6.5 Specifying the Command Language of the ISDN TA/V ................30
6.6 Configuring the ISDN TA/V DTE and Line Interfaces .................31
Table of Contents
5
Chapter Page
7. Using the ISDN TA/V..........................................................................32
7.1 Dialing Via the Communication Software Menu ............................32
7.2 Monitoring the Call...........................................................................32
7.3 During the Call..................................................................................33
7.4 Logging On to the Remote Computer ............................................33
7.5 Initiating a File Transfer...................................................................33
7.6 Logging Off and Clearing the Call ..................................................33
7.7 Receiving Incoming Calls .................................................................34
7.7.1 Auto-Answering .......................................................................35
7.8 Where to Go From Here...................................................................35
8. Troubleshooting.........................................................................................36
9. Regulatory Information.............................................................................39
Introduction to the Reference Section.........................................................41
10. Principles of Data Communication ........................................................43
10.1 How the ISDN TA/V Works ...........................................................43
10.1.1 Controling the ISDN TA/V ..................................................43
10.1.2 Error Correction ...................................................................44
10.1.3 Data Compression .................................................................44
10.1.4 Flow Control ..........................................................................45
10.1.5 Line Transmission Speed......................................................46
10.1.6 V.110 Rate Adaption .............................................................46
10.2 File Transfer Protocols....................................................................46
10.3 Terminal Emulation........................................................................47
11. Commanding the ISDN TA/V............................................................48
11.1 Via Communication Software Commands ....................................48
11.2 Via Intro Software Menu Selections................................................49
11.3 Using AT Commands......................................................................50
11.4 AT Command Rules........................................................................50
11.4.1 Formatting Command Lines ................................................51
11.4.2 Combining Commands.........................................................52
11.4.3 Waiting for a Response .........................................................52
11.4.4 Editing a Command Line .....................................................53
11.4.5 Repeating a Command Line ................................................53
11.5 Interrupting Data Traffic to Issue AT Commands........................53
12. ISDN TA/V Configurations ...............................................................55
12.1 Factory Configurations ...................................................................55
12.2 Selecting Which Configuration is Active .......................................56
12.3 Viewing Parameter Settings of the Active Configuration .............58
12.4 Creating a User-Defined Configuration ........................................59
12.5 Saving Configurations to the Power-Up Location.........................60
Table of Contents
6
ISDN TA/V
Chapter Page
13. Dialing, Answering, and Clearing Calls Using AT Commands.............61
13.1 Using the D Command...................................................................61
13.2 Using the Number Directory..........................................................62
13.3 Clearing a Call.................................................................................63
13.4 Answering an Incoming Call ..........................................................64
13.5 ISDN TA/V Response Codes..........................................................64
13.5.1 Valid Response Codes ...........................................................65
14. DTE Interface Commands and S-Register Settings.............................68
14.1 Data Transmission Mode ................................................................68
14.2 DTE Electrical Characteristics Conformance................................69
14.3 Default Async Speed........................................................................70
14.4 Setting the Communications Format.............................................70
14.4.1 Number of Data Bits .............................................................70
14.4.2 Parity Bits ...............................................................................71
14.4.3 Number of Stop Bits..............................................................71
14.5 Communications Signaling Requirements....................................71
14.5.1 DTR Control..........................................................................72
14.5.2 DSR Control ..........................................................................72
14.5.3 RTS Control...........................................................................73
14.5.4 CTS Control...........................................................................73
14.5.5 RTS/CTS Delay .....................................................................73
14.5.6 DCD Control..........................................................................74
15. User Commands ................................................................................75
15.1 Selecting AT or V.25bis Dialing Commands .................................75
15.2 AT Escape Sequence Character Key and Response Timeout.......75
15.3 Effect of the BREAK Key on a Terminal’s Keyboard....................76
15.4 Command Character Echo.............................................................77
15.5 Defining the Command Terminator Key ......................................77
15.6 Defining the Backspace Character Key..........................................77
15.7 Defining the Line Feed Character Key ..........................................78
15.8 ISDN TA/V Response (Result) Codes and
Extended Response Codes........................................................78
15.9 V.25bis Command Mode Format ...................................................78
15.10 Responding to AT Commands .....................................................79
15.11 Audible Alert Control ...................................................................79
15.12 Reverting to Power-up Configuration Settings............................80
15.13 Unit Identification Commands ....................................................80
7
Table of Contents
Chapter Page
16. ISDN Line Dialing Characteristics......................................................81
16.1 ISDN Line Transmission Rate ........................................................81
16.2 Enabling and Disabling Auto-Answering.......................................82
16.3 Causes of a Disconnection..............................................................82
17. Error Correction, Flow ControlData Compression, Rate Adaption.........84
17.1 Defining Whether Error Correction and/or
Rate Adaption Will Be Used .....................................................84
17.2 V.42bis Data Compression Characteristics ....................................86
17.3 Flow Control Characteristics (XON/XOFF).................................86
17.4 Buffer Disconnect Timer ................................................................87
18. V.25bis Dialing Commands ................................................................88
18.1 Call Request Commands.................................................................88
18.2 Call Responses.................................................................................89
18.3 Call Answer Commands..................................................................90
18.4 Storing Numbers in Memory (PRN)..............................................90
18.5 Requesting a List of Stored Numbers (RLN)................................91
18.6 List Stored Number Response........................................................91
18.7 Command Responses (Valid and Invalid).....................................91
18.8 Reverting to AT Command ............................................................92
Appendix A — DTE Pin Assignments and Connecting Cables...................93
Appendix B — AT Command Summary ......................................................96
Appendix C — S-Register Summary .............................................................107
Appendix D — ASCII Character Code Chart...............................................109
8
ISDN TA/V
Part I
Getting Started
9
Chapter1: Specifications
ISDN Compliance — Basic Rate ISDN (2B + D) using both channels
simultaneously with automatic channel
aggregation, Q.931, Q.921. V.110 rate adaption.
Compatible with NISDN-1, Euro ISDN, and
other national variants
Synchronisation — Variable RTS/CTS delay
Error Correction — V.42 LAPM
Data Compression — V.42 bis
Speed — X.21 (V.11): synchronous: up to 64000 bps;
asynchronous: up to 115200 bps (with
V.42 bis);
V.24/V.28: Up to 19200 bps;
V.36: Up to 48000 bps
Connectors — (1) RJ-45 female for the ISDN S-bus
(1) Modular phone socket (connector type will vary
depending on which ISDN TA/V you purchase)
(1) DB25 female for your DTE
(1) RJ-11 female CONTROL port, for entering
asynchronous AT commands
Power — 190 to 265 VAC, 47-63 Hz, 0.1A max, 11 watts
Size — 15H x 9W x 27D cm
Weight — 1.3 kg
1. Specifications
10
ISDN TA/V
2.1 Introducing Your New ISDN Terminal Adaptor
Your new ISDN TA/V provides a standalone interface to ISDN for your nonISDN equipment. It provides one S-Bus ISDN Basic Rate connection to a
single serial port, capable of handling both synchronous and asynchronous
data. A separate analogue port is also provided which can support a
connection to any standard analogue telephone network compatible
equipment, working in DTMF (dial tones not pulses) mode.
There are 10 separate models of the ISDN TA/V, with different power and
ISDN line specifications to accommodate the various requirements of
countries throughout the world. These differences have no effect on the
overall performance of any one model, however, so this manual is applicable
to all of them.
2. Introduction
11
2.2 Before You Get Started
2.2.1 A
BOUT THEMANUAL
“Do I have to read all the documentation?” You’ll be glad to know the answer
is no. The ISDN TA/V is designed for use by experienced and novice users,
and the manual is written with both in mind. It’s divided into two parts: Part I,
Getting Started; and Part II, Reference. In fact, there are several ways you can
use the manual to learn about your new ISDN TA/V:
Required Reading:
Your ISDN TA/V has been approved by BABT (the British Approvals Board
for Telecommunications) for connection to British Telecom’s ISDN service
under the approval number of NS/3940/5/P/604019, and it is important
that you make yourself familiar with the conditions of use as described in
Chapter 9 of this manual.
Installing ISDN TA/V Using the Intro Software (Chapter 3.0):
Intro is a DOS-based, full-featured program for installing and configuring
your ISDN TA/V. For most applications, it can be used as a substitute for
much of this manual. Read Chapter 3 to learn how to install and use Intro.
Then skip to Chapters 6 and 7 for information about making and receiving
ISDN calls.
Installing ISDN TA/V Without the Intro Software (Chapters 4-7):
These chapters provide a brief introduction for people who don’t use the
Intro software. You’ll learn how to install the unit, what additional
equipment you’ll need to establish a connection to a remote device, and
finally, how to configure your communication software (not included) so
you can instruct the ISDN TA/V to initiate and receive calls.
In most cases, the ISDN TA/V’s factory-default settings will be sufficient for
your application. And once you read through Chapters 4-7, you’ll be able to
use the Terminal Adaptor to connect to a remote computer via an ISDN
network, and carry out file transfers to and from it.
Part II: The Reference Section:
Part I, Getting Started does not cover any of the ISDN TA/V’s more
sophisticated features, or details about the command language you can use
to alter and customise your ISDN TA/V’s operation. You’ll find that
information in the Reference section of this manual.
Apple Macintosh Users:
Section 5.4 details special cable requirements you’ll need to know.
Chapter 2: Introduction
12
ISDN TA/V
2.2.2 C
ONVENTIONSUSED INTHISMANUAL
Keyed commands that you send to the ISDN TA/V, LCD messages, and
product features such as LED and port names, software titles, and menu
titles all appear in boldface letters, to help you distinguish them from the
descriptive text of this manual.
2.2.3 U
NPACKING
Before you install your ISDN TA/V, it is important that you compare the
contents of the shipping package against the packing list. If any of items listed
are damaged or missing, call your supplier to resolve the matter immediately.
You ISDN TA/V should include:
• (1) ISDN TA/V
• (1) Mains power cord
• (1) 3-metre line cord for connecting to the ISDN2 service
• (1) 2-metre DB9-female-to-DB25-male V.24 DTE cable
• This User’s Manual
• (1) 3.5-inch diskette, containing the Intro software
Save the box and protective packing material in case you need
to store or ship the terminal Adaptor in the future.
13
Chapter 2: Introduction
2.2.4 C
ALLINGYOURSUPPLIER
If you determine that your ISDN TA/V is malfunctioning, do not attempt to alter
or repair the unit. It contains no user-serviceable parts. Contact your supplier.
Before you do, make a record of the history of the problem. Your supplier will
be able to provide more efficient and accurate assistance if you have a
complete description, including:
• The nature and duration of the problem.
• When the problem occurs.
• The components involved in the problem.
• Any particular application that, when used, appears to create the problem
or make it worse.
2.3 Some Background Information About ISDN
ISDN (Integrated Services Digital Network) is a public switched digital
network which enables voice, data communications, video and many other
services, to be transmitted simultaneously over a single pipe consisting of two
64000-bps streams and a 16000-bps control channel.
The two 64000-bps streams are known as the bearer channels (B channels for
short; B1 and B2), with the control channel being referred to as the D
channel.
Your ISDN TA/V is approved for connection to an approved ISDN-2 service,
operating at data rates of 64000 bps, 56000 bps, 48000 bps, 38400 bps, 19200
bps, 14400 bps, 12000 bps, 9600 bps, 7200 bps and 2400 bps. Each of the two
B channels supported on a single ISDN line can be associated with either the
DTE interface or the telephone socket within your ISDN TA/V, and as such
provides you with simultaneously active data and voice channels.
B channel selection is handled automatically by the ISDN TA/V, and is totally
transparent to the user.
14
ISDN TA/V
2.4 A Brief Overview
You connect the ISDN TA/V to your ISDN service line via a rear-mounted
RJ-45 connector, which is fully compliant with ITU standards for the
ISDN S interface. Depending on the nature of the active traffic (data or
voice), this ISDN interface is automatically connected to either the rear
panel mounted 25-pin digital DTE interface, or via the unit’s analogue
circuitry to the telephone handset socket.
The 25-pin female DTE connector is by default configured to conform to
the electrical characteristics of ITU recommendation V.24/V.28 running in
asynchronous data mode, supporting a throughput rate of up to 19200 bps.
Using the AT command language to alter the active configuration, this port
can be configured to operate synchronously conforming to V.24/V.28;
synchronously conforming to ITU X.21 (V.11) at speeds up to 64000 bps
(aggregated channels); asynchronous conforming to ITU X.21 (V.11) at
speeds up to 115200 bps using V.42bis data compression; or
asynchronously/synchronously conforming to ITU V.36 at speeds up to
4800 bps.
A separate CONTROL port is provided for optionally entering AT commands
from an attached asynchronous terminal, and for accessing the management
interface of the ISDN TA/V. When the DTE interface is configured to
operate asynchronously (default configuration setting) the CONTROL port
would not normally be used since all commands can be entered via the DTE.
However, AT commands can only be entered asynchronously and a separate
command port is therefore required when the DTE has been configured to
operate synchronously. The CONTROL port operates at 9600 bps.
Industry standard communication software packages can be used to give
error-free data transfer and control. When installed in your PC, the
communication software is used to command the ISDN TA/V to dial and
accept calls etc. There is a wide variety of these software packages available
from computer dealers and computer user groups, the majority of which are
fully compatible with your ISDN TA/V.
A large number of specialised features such as error correction, data
compression, and rate adaption are supported by your ISDN TA/V. For
details of how and where such facilities should be used, and the configuration
requirements of the ISDN TA/V to enact them, refer to Part II, the reference
section of this manual.
15
Chapter 2: Introduction
2.5 Features of the ISDN TA/V
Your ISDN TA/V is a fully featured, high-speed digital dial-up device which
provides reliable asynchronous and synchronous operation over the ISDN. As
a complement to the high speed data transfer of up to 64000 bps, ITU V.42bis
data compression and ITU V.42 error correction are supported. The data
transfer speed between the DTE interface and your attached computer can
be configured to be as high as 115200 bps.
The ISDN TA/V’s compatibility with a number of dialing methods and
protocols, such as asynchronous AT commands and ITU V.25bis dialing,
allows you to use the unit in a variety of applications and environments, and
to control the ISDN TA/V’s configuration, dialing characteristics and
diagnostic features.
Four factory set configurations, containing the most commonly-used DTE
interface settings, are permanently stored in the Terminal Adaptor’s memory,
providing you with a quick and easy method of configuring the unit to be
compatible with asynchronous and synchronous data environments,
conforming to ITU V.24/V.28, X.21 (V.11) or V.36.
The principal features are:
• Support for digital to digital communication at speeds up to 64000 bps.
• V42bis data compression and V42 error correction via the ISDN sevice.
• V.110 rate adaption techniques.
• Rear-panel phone socket for connecting a PSTN telephone handset
(or other analogue equipment) to the ISDN service.
• Simultaneous support for ISDN-to-ISDN voice and data calls.
• All available DTE and analogue ports have access to either or both ISDN B
channels.
• Asynchronous dial DTE data rates from 300 to 115200 bps.
• Asynchronous AT commands entered via the DTE interface or the
dedicated CONTROL port.
• ISDN TA/V configuration changes via AT commands and the Intro
software program.
16
ISDN TA/V
• Compatibility with the industry-standard AT command set.
• Storage of up to 20 ISDN numbers in directory locations.
• Dialing via AT commands, V.25bis, or via PC by raising DTR
on the PC-to-DTE interface.
• High-speed transmission using asynchronous, synchronous, or UNIX
®
devices over the ISDN.
• Self-testing facility.
• Four factory-set configurations and two user-definable configuration
locations.
• Front-panel LCD and LED displays to inform you of the current status.
17
Chapter 3: Installing ISDN TA/V Using the Intro Program
3.1 Overview
Intro is a DOS-based software program that you load and run from your PC.
It’s designed to help you install and use all of the ISDN TA/V’s features and
facilities. To use Intro, your computer must be IBM®compatible, with a 3.5inch floppy drive, and a graphics card of at least EGA standard.
A DOS mouse driver is not a prerequisite, but it is recommended, since
Intro is easier to use under mouse control than keyboard control.
3.1.1 Q
UICKINSTALL
Insert the Intro diskette into your PC and type:
SETUP<CR>
from the appropriate drive prompt. Follow the on-screen prompts to install
the program files onto your hard disk. Select INSTALLATION from the
program’s main menu options. Instructions for installing and using your
ISDN TA/V will be clearly explained on-screen.
Installation is now complete, with each physical connection having been
tested for you. Using Intro you will now be able to make ISDN TA/V
configuration changes etc.
3.2 About the Intro Program
Initially, Intro familiarizes you with the ISDN TA/V and explains how it
should be connected to a DTE, the ISDN line, and a telephone handset.
Each connection that you make is automatically tested by Intro.
Subsequently the Intro software can be used to alter the ISDN TA/V’s
operating configuration either by you selecting an application, by selecting
specific features, or interactively (as though you had a dumb terminal
connected to the CONTROL port). However, it is important to note that
if you alter the definition of the DTE interface (from its default setting of
V.24/V.28 asynchronous command), Intro will no longer be able to
communicate with the ISDN TA/V.
3. Installing ISDN TA/V
Using the Intro Program
18
ISDN TA/V
3.3 Installing Intro Program Files on Your Hard Disk
To install the Intro files on your hard disk:
1) Insert the program diskette into the floppy drive of your PC, and type the
letter which identifies the floppy drive, followed by a colon and then press
return as shown below:
A:<CR> or B:<CR>
When the DOS prompt alters to indicate that this drive is active, type:
SETUP<CR>
An error message will be displayed if the PC’s graphics card is not able to
support the Intro software, and the installation will be aborted. If this
occurs, move on to Chapter 4 and follow the remainder of this manual.
2) Follow the instructions given on-screen to install the files within the
required directory.
3.4 Connecting Your ISDN TA/V
Once the Intro files are installed on your hard disk, answer YES when the
final screen prompts you with:
Your software is installed. Are you ready to install the ISDN TA/V now?
This automatically initiates the Intro program and displays its base screen
options.
If you answer NO to this screen, refer to Section 3.6 for details of how to
initiate Intro from DOS.
Select INSTALLATION from the base screen and follow the instructions
given. When the ISDN TA/V-to-computer (DTE) connection and the ISDN
TA/V-to-ISDN line connection have been established, they will automatically
be tested by Intro and any errors will be reported to you.
19
Chapter 3: Installing ISDN TA/V Using the Intro Program
3.5 Navigating Through the Intro Screens
When using a mouse to select the appropriate action button, position the
mouse cursor directly over the required action and press the left-hand mouse
button once to select it.
When navigating around the screen using keyboard commands, use the arrow
keys, tab key and shift tab keys to highlight the required option, and the
carriage-return key to action it. Note that the escape key can be used to action
an EXIT button.
3.6 Running Intro from DOS
To run the Intro software from DOS from the root directory of your hard disk
select the sub-directory into which you copied Intro, and type:
INTRO<CR>
3.7 Using Intro to Configure the ISDN TA/V
A powerful function of the Intro software is that it enables you to alter the
ISDN TA/V’s factory-default configuration settings, using simple menu
selections. However, as previously mentioned, the factory-default
configuration will normally be sufficient for most ISDN TA/V users, and may
never need to be altered.
We therefore recommended that this function of the Intro software only be
used by experienced communications device operators, and then only in
conjunction with the reference instructions in Part II of this manual.
If you alter the definition of the DTE interface (from its default setting
of V.24/V.28 asynchronous data), Intro will immediately lose contact with,
and no longer be able to communicate with, the ISDN TA/V. Using the
management interface of the CONTROL port then becomes the easiest
way of commanding the ISDN TA/V. (The Reference section includes
instructions for using this management interface).
20
ISDN TA/V
4.1 Preparing for Installation
In order to install and use your ISDN TA/V, you’ll have to make sure you
have all the proper equipment, cables, and connectors. These requirements
may vary depending on your particular application
4.2 Connecting a Computer
An ISDN TA/V can only receive data from your computer via a serial port
connection. On most IBM or compatible PCs , this would be a D-shell male
connector, V.24 RS-232 serial port, with 9 pins (DB9). Connecting an Apple
®
Macintosh®computer requires an available 9-pin serial port. Most PCs have
only one serial port, which is likely to be labeled COM1.
Many devices other than an ISDN TA/V can be connected to a serial port, for
example a serial printer, mouse or graphics plotter. If your PC has only one
serial port, and this is already supporting an external device, you can swap
between the ISDN TA/V and the other device as required. However, if you
prefer to use both devices without the interruption of plugging and
unplugging cables, ask your PC supplier to install a second serial port.
4.3 Connecting an Alternate DTE Device
This must be equipped with either a V.24/V.28, X.21 (V.11) or V.36 serial
port, for connecting to the DTE interface of the ISDN TA/V.
4.4 The CONTROL Port Connection
Optionally, an asynchronous terminal can be connected to the CONTROL
port of the ISDN TA/V to enable you to pass AT commands to the ISDN
TA/V when using a synchronous transmission format over the DTE interface
link, or to gain access to the unit’s management interface facilities.
The communications format of any device connected to the CONTROL port
must be set to 8N1 (8 data bits, no parity, 1 stop bit), running at
9600 bps.
4. ISDN TA/V Introduction
for Non Intro Users
21
Chapter 4: ISDN TA/V Introduction for Non Intro Users
4.5 Communication Software
When installed in your PC, this is used to command the ISDN TA/V to dial
and accept calls etc. There is a wide variety of these software packages
available from computer dealers and computer user groups, the majority of
which are fully compatible with your ISDN TA/V. For example, a package
such as ‘Terminal’ (a program within the Microsoft®Windows™ 3.0 graphical
environment for PCs) is adequate.
4.6 Connecting Cable
For maximum performance the cable which connects your computer to the
ISDN TA/V DTE interface must support RTS/CTS hardware handshaking for
use with data compression and error correction.
One such cable conforming to the electrical characteristics of the V.24/V.28
interface will have been supplied in your ISDN TA/V package. If for any
reason you have to make up a cable yourself, refer to the cable specifications
in the Appendix. As a general rule: the shorter the cable, the better it is.
Apple Macintosh users should refer to Section 5.4 for details on the
connecting cables they’ll need.
4.7 ISDN Service Connection
You will need a standard ISDN line wall socket to plug your ISDN TA/V’s line
cable into. If one is not available close enough to where you are going to site
your ISDN TA/V, contact your line supplier for assistance.
All connections to the Integrated Services Digital Network are subject to the
rules and regulations of the governing body of the country in which the
connection is made. Chapter 9 of this manual details the statutory
requirements of these governing bodies. It is important that you read these
requirements carefully and ensure your compliance with them.
4.8 Service Number of the Remote Device
In order to connect to a remote device you will obviously need to know the
telephone number of the remote ISDN TA/V.
22
ISDN TA/V
4.9 Communication Settings
To communicate efficiently you will have to configure your communication
software to use the correct word length, parity, and number of stop bits
according to the requirements of the DTE interface or CONTROL port.
Details about how your data is broken into short strings and transmitted
according to the settings of the data format are fully explained in the
Reference section. It’s not important, at this stage, to understand the
significance of the format.
The most popular setting for data format of a service which is connected to
the PSTN is 8 data bits, no parity, 1 stop bit (described as 8N1); although
many public data services use 7 data bits, even parity, 1 stop bit (7E1). You will
normally be advised of the format used by the remote computer or service on
payment of a subscription, or on request if no subscription fee is required.
Setting the communications data format is normally a menu option within
your communication software. Refer to Chapter 6 of this manual for more
information, and your communication software manual for detailed
guidance.
23
Chapter 5: Installing ISDN TA/V Without Using the Intro Program
This chapter should only be followed if you are unable to load and use the
Intro software as described in Chapter 3 It explains how to install your ISDN
TA/V, describes the function of the front panel LEDs, and also details the
special cable requirement for Macintosh computer users.
5.1 Connecting Your ISDN TA/V
Use Figure 5.1 and the following steps to connect the ISDN TA/V between
your computer and the ISDN line:
Figure 5.1 Front and Back Views of the ISDN TA/V
1) Ensure that both your computer and the ISDN TA/V are powered off
(The half of the back-panel ON/OFF switch with a circle is depressed).
2) Connect the supplied power lead into the socket marked with the proper
voltage indication on the ISDN TA/V.
3) Plug the other end of the mains lead into a mains socket.
5. Installing the ISDN TA/V Without
Using the Intro Program
POWER
ISDN OK
SEND
RECEIVE
ANSWER
TERMINAL 1
TERMINAL 2
ON-LINE 1
ON-LINE 2
LINE
CONTROL
RESET
DTE
0.5A(T)
250V
~
I
0
220 - 240V
50 - 60 Hz
1A
~
24
ISDN TA/V
4) Insert the male end of the supplied V.24/V.28 DTE connecting cable
into the connector marked DTE on back of the ISDN TA/V, and tighten
the locator screws to secure the cable to Terminal Adaptor.
The cable requirement of the DTE interface when it is configured to
conform to the electrical characteristics of X.21 (V.11) or V.36 are given
in Appendix A. If the interface is going to be configured to conform to
one of these ITU recommendations, a suitable cable should be used in
place of the supplied V.24/V.28 DTE cable. The ISDN TA/V will then
autosense the interface standard if the connecting cable is wired as shown
in Appendix A.
5) Plug the other end of the connecting cable into the serial port on the
back of your computer or other DTE, and tighten the locator screws.
6) Using the ISDN service cable supplied, plug the jack end into the socket
marked LINE on the back of the ISDN TA/V. Note that any ISDN TA/V
can be damaged by lightning. When the possibility of lightning is high,
unplug this connection to the telephone line.
Warning
Interconnection directly or by way of other apparatus, of ports marked
“SAFETY WARNING see instructions for use” with ports marked or not
so marked, may produce hazardous conditions on the network. Advice
should be obtained from a competent engineer before such a connection
is made.
7) Optionally connect an asynchronous VT100™ terminal to the
CONTROL port of the ISDN TA/V. This terminal can then be used to
send AT configuration and dialing commands to the ISDN TA/V, and
also to access the internal management interface.
Note that this terminal connection need not be used if the DTE interface
is configured to accept asynchronous AT commands (default
configuration setting). A PC or terminal connected to the CONTROL
port must be configured to use 8 data bits no parity and 1 stop bit as the
communications format, running at 9600 bps.
25
Chapter 5: Installing ISDN TA/V Without Using the Intro Program
8) Optionally connect a PSTN telephone handset, or any other compatible
analogue equipment, operating in DTMF (tone not pulse) mode to your
ISDN TA/V by connecting the phone’s telephone-line plug into the
socket marked with a handset symbol on the back of the ISDN TA/V.
This port is in effect an analogue to digital converter which allows you to
use your conventional PSTN telephone on an ISDN line.
It is capable of supporting ringing current and call-progress tones, and
will support analogue devices to a maximum of REN=1. Providing one of
the two 64000-bps ISDN channels is not being used by the DTE interface,
it is available for you to make voice calls over the ISDN via this analogue
port.
Incoming ISDN traffic carries a voice/data identifier which enables the
ISDN TA/V to automatically direct incoming voice calls to the handset
port, and incoming data calls to the DTE interface.
9) Plug the unattached end of the supplied line cable into the ISDN wall
socket.
5.2 Powering ON the ISDN TA/V
Having carefully followed the instructions for connecting your ISDN TA/V,
swith on power to the unit by pressing the half of the back-panel ON/OFF
switch marked with a line. Then switch on power to your computer.
Nine LED indicators on the ISDN TA/V’s front panel are used in conjunction
with the LCD display to report the unit’s current status.
When the ISDN TA/V is initially powered-on it initiates a self-test, which is
shown by the LCD reporting
Self Test
followed shortly afterwards by
Passed or Failed
If a self-test failure is reported, or the POWER LED fails to light, refer to
Chapter 8, Troubleshooting, for help.
26
ISDN TA/V
5.3 The Front-Panel LCD and LEDs
LCD — The Liquid Crystal Display is a two-line sixteen character display used
as a progress indicator and to report system messages.
POWER — Should be lit whenever the ISDN TA/V is powered on, indicating
that it is capable of operating. During the power-on test sequence, and all
other tests, this indicator will flash every half second.
ISDN OK — Is an indicator of the state of the ISDN line. This LED should be
lit whenever the ISDN TA/V is powered on while connected to a working
ISDN service.
SEND — Flashes on and off to indicate that the ISDN TA/V is receiving data
from the terminal or computer attached to the DTE interface.
RECEIVE — Flashes on and off to indicate that the unit is passing data
received over the ISDN to the DTE interface.
ANSWER — Lights to indicate that the ISDN TA/V has been configured to
automatically answer an incoming data call. When an incoming data call is
detected, this indicator will flash.
TERMINAL 1 — This is an indicator of a signal provided by the computer or
terminal attached to the ISDN TA/V’s DTE interface. It is normally used to
signal the ISDN TA/V that a call can be made, or an incoming call answered.
The ISDN TA/V may be configured to act in different ways on receipt of this
signal (according to the AT&D and AT&M commands). Refer to Part II of
this manual, the Reference section, for further details.
TERMINAL 2 — Is not used on this version of the ISDN TA/V.
ON-LINE 1 — Lights to indicate that the unit has seized either channel of the
ISDN line, and is forwarding data traffic on the ISDN line to the rear- panel
connector marked DTE.
ON-LINE 2 — Is not used on this version of the ISDN TA/V.
27
Chapter 5: Installing ISDN TA/V Without Using the Intro Program
5.4 Macintosh Computer Compatibility Requirements
When using the ISDN TA/V in conjunction with a Macintosh computer,
all that is required to establish a successful installation is the appropriate
connecting cable, and then, depending on the type of handshaking being
used, a small change may have to be made to the ISDN TA/V’s operating
configuration.
Although a Macintosh cable is not supplied with the unit, these are readily
available from your computer dealer. Alternatively you may choose to build
one yourself by following the appropriate pin-out diagrams shown in Figures
5.2 and 5.3
5.4.1 U
SINGCABLETHAT’SCOMPATIBLE WITHYOURCOMMUNICATIONSOFTWARE
Before you can select the appropriate cable for connecting the DTE interface
to your Macintosh computer, it is important that you first ascertain whether
the communication software that you are going to use to command the ISDN
TA/V supports hardware or software handshaking as the means of flow
control. Having done this, you must use a compatible cable to connect to
the ISDN TA/V.
5.4.2 H
ARDWAREHANDSHAKINGCABLE
Figure 5.2 shows the cable used to connect the DTE interface to a Mac®using
communication software which accepts hardware handshaking:
Figure 5.2 Pinning of Hardware Handshake Cable for Macintosh
Using this cable requires no change to the ISDN TA/V’s factory-default
configuration.
12
345
678
20
23 7
45
28
ISDN TA/V
5.4.3 S
OFTWAREHANDSHAKINGCABLE ANDSETUPCOMMAND
The cable used to connect the DTE interface to a Macintosh using
communication software which requires software handshaking is shown
in Figure 5.3:
Figure 5.3 Pinning for Software Handshake Cable for Macintosh
When using this cable, a small change will have to be made to the ISDN
TA/V’s operating configuration before a communications link can be
established. Having connected the DTE interface to the Macintosh, switch
on power to the ISDN TA/V. Following the instructions given in your
communication software manual, use the software to change the ISDN
TA/V’s operating configuration by typing the following command:
AT\Q1&D2&W<CR>
Within this command string, the characters &W indicate that the command is
to be stored in memory, and loaded automatically each time the ISDN TA/V
is powered on. (See the Reference section for more details about this and
other command lines.)
12
345
678
20
23 78
29
Chapter 6: Installing and Configuring Software in your Computer
Generally when using the ISDN TA/V you need to know very little about
the unit itself, since its control is governed by the communication software
installed in your computer. This software is not included with the purchase of
the ISDN TA/V, therefore for details of how to install and use these programs
you must refer to their dedicated user guides. There are, however, a limited
number of settings which reflect the requirements of your ISDN TA/V that
have to be configured into the communication software. These are outlined
in this chapter.
6.1 Selecting the Flow-Control Type
Flow control is the system by which the computer or ISDN TA/V is instructed
to stop sending data if the processing buffers of the connected device are full,
and to recommence sending once the buffers reach a low level. In all
applications of computer-to-ISDN TA/V communications, the flow-control
system used should be of the type RTS/CTS (otherwise known as hardware
flow control) which should be specified within the communication software
configuration.
Hardware flow control is recommended over software flow control because it
allows fully transparent passage of data through the ISDN TA/V, in that the
TA/V’s flow control does not interfere with any data or protocols used by the
attached computer equipment.
6.2 Setting the Data Rate (Data Transfer Speed)
The ISDN interface is transparent to whatever data rate is configured into the
communication software. However, the unit offers the best throughput of
data between its DTE interface and the attached computer when it is running
at the highest available speed. For this reason your computer’s serial port
should be set to operate at its fastest speed, but not exceeding 115,200 bps
which is the highest acceptable speed of your ISDN TA/V’s DTE interface.
Note: A lower data rate can be used, and this will be recognised by your ISDN
TA/V.
6. Installing and Configuring
Communication Software
in Your Computer
30
ISDN TA/V
6.3 Specifying the Communications Format to be Used
The communications format used between your PC and the ISDN TA/V’s
DTE interface is configured in the communication-software program’s setup
options, and should initially be set to 8 data bits, no parity with 1 stop bit,
often referred to as 8N1. Note that a PC or terminal connected to the
CONTROL port must be configured to use 8N1 as the communications
format, running at 9600 bps.
6.4 Specifying the Terminal Emulation to be Used
Terminal emulation is the term given when a computer emulates the terminal
type required by the remote computer with which it is exchanging data.
Providing that you have been notified of the terminal type that the remote
computer expects to be connected to, this can be specified in the
set-up options of your communication-software package.
6.5 Specifying the Command Language of Your ISDN TA/V
The command language used to issue instructions to your ISDN TA/V (such
as dial a number, or answer a call) is compatible with the industry-standard
AT commands, and can be typed directly at your computer’s keyboard (in
asynchronous mode), or indirectly via the menu structure of your
communication-software package.
Unfortunately we have to generalise at this point because you could be using
one of a great many communication-software packages to interact with your
ISDN TA/V. However, in order for your software to be able to instruct the
unit to dial, etc, it will need to be informed of the type of command language
used by the ISDN TA/V.
By selecting from the menu options available (refer to your communicationsoftware guide for details):
• Specify that the command language to be used is AT or HAYES
compatible.
• Specify that the command required to initiate dialling is ATD.
• Specify that the command to answer an incoming call is ATA.
• Specify that the command used to hang-up a call is +++ (three plus signs)
followed by ATH.
31
Chapter 6: Installing and Configuring Software in your Computer
6.6 Configuring the ISDN TA/V DTE Interface and Line Interface
It would be logical to assume that because the serial port of your computer
needs to be configured (with respect to the data rate, flow-control method
and data format), the ISDN TA/V’s DTE and LINE ports would require the
same. However, one of the many features of your ISDN TA/V is its ability to
automatically sense the serial port settings of the PC (when it receives a
command line originated from the PC), and the ISDN line rate. Your ISDN
TA/V will adjust its operating characteristics accordingly, thus ensuring
compatibility with the attached device.
Note that for efficient and uninterrupted data transfer, it is important that
the data rate of the ISDN line is slower than the data rate of the DTE
interface. If this situation is reversed, data arriving on the line will overflow
the ISDN TA/V’s buffers while waiting to be sent from the DTE interface to
your computer. A data overflow means lost data.
Under normal operating circumstances, the ISDN TA/V attached to the
remote computer will also be able to auto-sense the line, and lower, or raise,
its transmission speed to suit your ISDN TA/V. For this reason, there is no
need for any configuration changes to your ISDN TA/V’s default settings
unless you detect an incompatibility with the remote computer.
Loading...