Black Box IS300AE User Manual
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Black Box IS300AE User Manual

Black Box IS300AE User Manual

Isdn ta/v
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INFORMATION
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ISDN TA/V
P O W
D
S E N
R E C
A N S
T E R M
M I N
T E R
- L I N
O N
E R
E I V E
W E R
1
I N A L
A L 2
N T A
I S D
E 2
JANUARY 1995
IS300AE
/ V

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  • Page 1 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 SUPPORT Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 INFORMATION Web site: www.blackbox.com • E-mail: info@blackbox.com...
  • Page 2 FCC/IC STATEMENTS 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...

  • Page 3: Table Of Contents

    ISDN TA/V Table of Contents 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.
  • Page 4 Table of Contents 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...
  • Page 5 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.
  • Page 6 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...

  • Page 7: Getting Started

    ISDN TA/V Part I Getting Started...

  • Page 8: Specifications

    Chapter1: Specifications 1. 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 Variable RTS/CTS delay Synchronisation — Error Correction —...

  • Page 9: Introduction

    ISDN TA/V 2. Introduction 2.1 Introducing Your New ISDN Terminal Adaptor Your new ISDN TA/V provides a standalone interface to ISDN for your non- ISDN equipment. It provides one S-Bus ISDN Basic Rate connection to a single serial port, capable of handling both synchronous and asynchronous data.

  • Page 10: Before You Get Started

    Chapter 2: Introduction 2.2 Before You Get Started 2.2.1 A BOUT THE ANUAL “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.
  • Page 11 ISDN TA/V 2.2.2 C ONVENTIONS SED IN ANUAL 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.

  • Page 12: Some Background Information About Isdn

    Chapter 2: Introduction 2.2.4 C ALLING UPPLIER 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: •...

  • Page 13: A Brief Overview

    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.

  • Page 14: Features Of The Isdn Ta/V

    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.
  • Page 15 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 ®...

  • Page 16: Installing Isdn Ta/V Using The Intro Software

    Chapter 3: Installing ISDN TA/V Using the Intro Program 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.

  • Page 17: Installing Intro Program Files On Your Hard Disk

    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>...

  • Page 18: Navigating Through The Intro Screens

    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.

  • Page 19: Isdn Ta/V Introduction For Non-Intro Users

    ISDN TA/V 4. ISDN TA/V Introduction for Non Intro Users 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.

  • Page 20: Your Communication Software

    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.

  • Page 21: Communication Settings

    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.

  • Page 22: Installing The Isdn Ta/V Without Intro

    Chapter 5: Installing ISDN TA/V Without Using the Intro Program 5. Installing the 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.
  • Page 23 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.

  • Page 24: Powering On The Isdn Ta/V

    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.

  • Page 25: The Front Panel Lcd And Leds

    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.

  • Page 26: Macintosh Computer Compatibility Requirements

    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.
  • Page 27 ISDN TA/V 5.4.3 S OFTWARE ANDSHAKING ABLE AND ETUP OMMAND The cable used to connect the DTE interface to a Macintosh using communication software which requires software handshaking is shown in Figure 5.3: 6 7 8 3 4 5 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.

  • Page 28: Installing And Configuring Your Pc Communication Software

    Chapter 6: Installing and Configuring Software in your Computer 6. Installing and Configuring Communication 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.

  • Page 29: Specifying The Communications Format

    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.

  • Page 30: Configuring The Isdn Ta/V Dte And Line Interfaces

    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.

  • Page 31: Using The Isdn Ta/V

    ISDN TA/V 7. Using the ISDN TA/V Now that you’ve configured the serial port of your PC to match the requirements of the Terminal Adaptor; and the physical connections between your PC, the DTE interface, and the ISDN network are correctly made, you’re ready to complete your first call via the ISDN TA/V.

  • Page 32: During The Call

    Chapter 7: Using the ISDN TA/V For example: CONNECTED 64Kbps V.42 indicates a line speed of 64000 bps using V.42 error correction. This LCD message is also echoed to your computer screen. 7.3 During the Call Your computer is now in direct communication with the remote computer, and whatever is entered at your keyboard will be relayed to the remote computer.

  • Page 33: Receiving Incoming Calls

    ISDN TA/V Alternatively, you can initiate a disconnection by typing an ISDN TA/V command sequence (detailed in the Reference section), or by selecting the disconnect option from the menu of your local communication software. Refer to your communication software manual for details of how to disconnect a call in this way.

  • Page 34: Auto-Answering

    Chapter 7: Using the ISDN TA/V 7.7.1 A UTOMATIC NSWERING OF NCOMING ALLS When the ISDN TA/V is configured with auto-answer enabled on DTR (as it is in the factory-default configuration), as long as DTR is present on the DTE interface (the ISDN TA/V’s TERMINAL 1 LED is lit) the unit will answer any call that is incoming on the line irrespective of whether it is carrying voice or data traffic.

  • Page 35: Troubleshooting

    ISDN TA/V 8. Troubleshooting Your ISDN TA/V has been designed to give you reliable, trouble-free use. However, if you encounter any problems, this chapter will assist you in diagnosing and overcoming the difficulty. • Positioning Your ISDN TA/V Where you position your ISDN TA/V can affect its operation, and therefore the following site-selection guidelines should be followed to enhance its performance: •...
  • Page 36 Chapter 8: Troubleshooting • The ISDN OK LED Does Not Light Ensure that the ISDN TA/V is powered on with its POWER LED alight. Verify the connection of the line cord to the ISDN TA/V’s socket marked LINE, and the ISDN service outlet. If the LED still fails to light, check your ISDN service by plugging the ISDN TA/V into an alternate ISDN service outlet to see if it works there.
  • Page 37 ISDN TA/V • Will Not Answer Incoming Calls Using the factory-default configuration, the auto-answer facility will be enabled on DTR, and you should check that this has not been altered (refer to the Reference section for details). Other possibilities are that the ISDN line or socket may be faulty, or the ISDN TA/V may not be connected to the ISDN socket at all.

  • Page 38: Regulatory Information

    Chapter 9: Regulatory Information 9. Regulatory Information Your ISDN TA/V has been approved by BABT (the British Board of Telecommunications) for connection to British Telecom’s ISDN service under the approval number of NS/3940/5/P/604019. 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, and advice must be obtained from a competent engineer before such a...
  • Page 39 ISDN TA/V The mains cable supplied with the unit is fitted with a moulded plug, for connection to the standard socket outlet. Should the plug not be of the correct type for the outlet that it is to be connected to, the plug should be removed and the cable re-wired to the correct type of plug.

  • Page 40: Introduction To The Reference Section

    ISDN TA/V Chapter 9: Regulatory Information Introduction to the Reference Section Overview Before reading this part of the manual you should be familiar with Part I — Getting Started, and already have installed your ISDN TA/V according to the instructions given there. The Reference section is, as its name suggests, a reference document which details the functionality of each command that can be sent to your ISDN TA/V in order to customise its use.
  • Page 41 ISDN TA/V Not all of Intro’s features can be accessed in this way, and indeed Intro can not be used at all when the ISDN TA/V’s operating configuration doesn’t allow AT commands on the DTE interface. In these circumstances you will therefore have to familiarise yourself with aspects of the AT command language or management interface menu structure, since you are likely to have to command the modem using a VT100 terminal connected to the...

  • Page 42: Principles Of Data Communication

    Chapter 10: Principles of Data Communication 10. Principles of Data Communication An ISDN TA/V provides an interface between the digital world of an attached computer, and that of the ISDN service, and also between the analogue world of a telephone handset and the ISDN service. In this chapter we take a moment to explain why its use is necessary to enable a communication to take place, and explain some of the terminology that you’ll find in later chapters.

  • Page 43: Error Correction

    ISDN TA/V AT command string, and sends this to the unit. As a result you, the operator, do not need to have a great understanding of the particular command structure, since all you have to do is select the parameter settings you want to use from the menu options.

  • Page 44: Flow Control

    Chapter 10: Principles of Data Communication Files that have already been compressed using PC-based compression software such as ZIP or ARC ® are not particularly suited to further compression, and will only receive a small percentage increase in throughput time when transmitted using the V.42bis standard.

  • Page 45: Line Transmission Speed

    ISDN TA/V IMPORTANT — The type of flow control that you should use on a given communications link is normally dictated by the requirements of the service to which you are connecting, and whichever of the two methods your ISDN TA/V is configured to use must also be configured into the operational settings of your communication-software program.

  • Page 46: Terminal Emulation

    Chapter 10: Principles of Data Communication 10.3 Terminal Emulation To enable trouble-free connections to a wide range of remote computer systems, communications-software programs offer several terminal emulation possibilities. These are mini-programs which, when running, make your computer appear to the remote computer as an acceptable terminal device. By making your computer emulate a particular type of terminal, the software sets up the correct control codes which are passed to the remote computer during dial-up and answering, and informs your computer how to handle...

  • Page 47: Commanding The Isdn Ta/V

    ISDN TA/V 11. Commanding the ISDN TA/V Before your ISDN TA/V can effect a communications link you have to issue a number of instructions to it to tell it what number, when, and how to dial or answer a call. You may also want to instruct the ISDN TA/V to perform a test of one or another part of the circuit.

  • Page 48: Via Intro Software Menu Selections

    Chapter 11: Commanding the ISDN TA/V from within the software’s menu structure), and address the ISDN TA/V directly by typing commands from the AT command language. Alternatively, you can use the supplied Intro software to command and configure the ISDN TA/V, as outlined in Section 11.2 11.2 Via Intro Software Menu Selections Intro is a DOS-based software program designed to help you command the...

  • Page 49: Using At Commands

    ISDN TA/V 11.3 Using AT Commands Entering AT command sequences, via the DTE interface or CONTROL port, from any asynchronous computer or terminal keyboard provides greatest flexibility when commanding the ISDN TA/V. This method of control also requires the greatest level of knowledge in that it is like using any language— if you only think that you know how to say whatever you want to say, you are likely to get it wrong and will be misunderstood.

  • Page 50: Formatting Command Lines

    Chapter 11: Commanding the ISDN TA/V 11.4.1 F ORMATTING OMMAND INES With the exception of two commands, all command lines must begin with the letters AT. This can be typed in either upper or lower case, but not in a mixture of upper and lower case.

  • Page 51: Combining Commands

    ISDN TA/V 11.4.2 C OMBINING OMMANDS A command line can contain a maximum of 40 characters in it, and may be constructed of a combination of commands. You can use spaces as fillers to make the commands easier to read; the ISDN TA/V ignores these fillers and they are not counted among the characters which make up the command string.

  • Page 52: Editing A Command Line

    Chapter 11: Commanding the ISDN TA/V 11.4.4 E DITING A OMMAND If you make a mistake when compiling a long ISDN TA/V command line, the backspace key or <Ctrl>H (default setting as held in S-register S5) can be used to reposition the cursor and correct the mistake. The keyboard’s delete key does not have the same effect.
  • Page 53 ISDN TA/V 11.5.1 R ETURNING TO AN LINE TATE FTER NTERRUPTING The O command is used to return the ISDN TA/V from a command state to an on-line state when a connection has been interrupted using the +++ command. If you have placed the ISDN TA/V in command mode and are still connected to the remote system, type ATO<CR>...

  • Page 54: Isdn Ta/V Configurations

    Chapter 12: ISDN TA/V Configurations 12. ISDN TA/V Configurations An ISDN TA/V’s configuration determines its operating characteristics with regard to how it connects to and communicates with the local DTE, and how it communicates over the ISDN line. To this end, your ISDN TA/V is equipped with four factory-set configurations (Factory 0 - 3), covering the most common connectivity requirements of the attached DTE.

  • Page 55: Selecting Which Configuration Is Active

    ISDN TA/V • Factory 1 — V.24/V.28 DTE interface operating synchronously at 19200 bps. Dialing is initiated using V.25bis HDLC commands, and automatic answering is enabled. V.110 rate adaption is employed. This configuration is designed for use in specialist applications of the ISDN TA/V, where a synchronous V.24 data link exists between the ISDN TA/V and the local DTE.
  • Page 56 Chapter 12: ISDN TA/V Configurations 2) When powering on the ISDN TA/V using the rear-panel ON/OFF switch, while holding in the rear panel-mounted RESET button, the unit’s LCD will toggle at three-second intervals through the stored configurations (Factory and User), naming each configuration location. By releasing the RESET button when the configuration that you want to load is displayed in the LCD, that configuration’s parameter settings will be loaded automatically as the active configuration.

  • Page 57: Viewing Parameter Settings Of The Active Configuration

    ISDN TA/V The Z command is used to load the power-up configuration, or a user configuration, where: ATZ0<CR> Loads the power-up configuration as the active configuration. ATZ1<CR> Loads User 1 as the active configuration. ATZ2<CR> Loads User 2 as the active configuration. 12.3 Viewing Parameter Settings of the Active Configuration The &V command is used to display the parameter settings of the active configuration on your computer/terminal screen.

  • Page 58: Creating A User-Defined Configuration

    Chapter 12: ISDN TA/V Configurations 12.4 Creating a User-Defined Configuration Where the operating requirements of the remote ISDN TA/V, to which you want to establish a connection, differ from those provided by any of the factory-set configurations, you can create and store a user-defined configuration expressly for use when communicating with that remote Terminal Adator.

  • Page 59: Saving Configurations To The Power-Up Location

    ISDN TA/V 12.5 Saving a Configuration to the Power-Up Location By default the configuration stored in the power-up configuration location exactly matches that of Factory 0. This has been done because the power-up configuration is automatically loaded as the active configuration when the ISDN TA/V is powered on, and the configuration settings within Factory 0 would normally be used by the majority of ISDN TA/V users.

  • Page 60: Dialing, Answering, And Clearing Calls Using At Commands

    Chapter 13: Dialing, Answering, & Clearing Calls Using AT Commands 13. Dialing, Answering, and Clearing Calls Using AT Commands When using your ISDN TA/V, there are five ways that a call can be dialed, the first two of which you will already have used when working through Part I of this manual: •...

  • Page 61: Using The Number Directory

    ISDN TA/V If the call is answered by an ISDN TA/V, it begins to evaluate the type of ISDN TA/V to which it is connected, the transmission protocol to be used, and whether the remote ISDN TA/V will permit error correction, data compression, etc.

  • Page 62: Clearing A Call

    Chapter 13: Dialing, Answering, & Clearing Calls Using AT Commands 13.2.3 C LEARING THE ONTENTS OF THE IRECTORY Issuing the command AT&N99<CR> will clear the contents of all directory locations. 13.2.4 C LEARING A INGLE IRECTORY OCATION A single entry within the directory can be erased using the Nn? command, where n represents the directory location.

  • Page 63: Answering An Incoming Call

    ISDN TA/V 13.4 Answering an Incoming Call Using the default settings of Factory configuration 0, your ISDN TA/V has been configured to answer incoming calls automatically. This can be altered using TA/V commands as explained later in this manual. On receipt of an incoming call, your ISDN TA/V’s front-panel LCD displays INCOMING RING.

  • Page 64: Valid Response Codes

    Chapter 13: Dialing, Answering, & Clearing Calls Using AT Commands The X command is used to determine which of the extended response codes will be displayed to you: ATX0<CR> Disables response codes 5-27. ATX1<CR> Enables response codes 5-16. ATX2<CR> Enables response codes 5-16. ATX3<CR>...
  • Page 65 ISDN TA/V Additional response codes that will be displayed if the X parameter is set between 1 and 4 are: Numeric Text Description Format Format CONNECT 1200 Connected at 1200 bps NO DIALTONE ISDN line not available BUSY Busy signal detected on the line NO ANSWER No answer CONNECT 2400...
  • Page 66 Chapter 13: Dialing, Answering, & Clearing Calls Using AT Commands Additional response codes that will be displayed if the X parameter is set to 5 or 6 (when set to X6 the EC suffix will be replaced by either a V.42 or V.110 suffix).

  • Page 67: Dte Interface Commands And S-Register Settings

    ISDN TA/V 14. DTE Interface Commands and S-Register Settings This chapter concentrates on the AT commands and S-Register settings that affect the link between the ISDN TA/V and your DTE. The existing setting for an S-Register can be displayed using the ATSn?<CR> command (where n is the S-Register number you’re interested in).

  • Page 68: Dte Electrical Characteristics Conformance

    Chapter 14: DTE Interface Commands snd S-Register Settings &M2 or &Q2 Synchronous operating mode where the ISDN TA/V dials the number stored in directory location 1 when the DTR signal turns off and then on (Control signal in X.21 mode), on the DTE interface. A synchronous interface card must be installed in your PC.

  • Page 69: Default Async Speed

    ISDN TA/V 14.3 Default Async Speed Asynchronous DTE transmission speed will automatically be negotiated between the DTE and your ISDN TA/V when the DTE first sends an AT command to the ISDN TA/V. However, if the first communication between the ISDN TA/V and the DTE is initiated by the ISDN TA/V, i.e. when the ISDN TA/V is powered on and the first action is to answer a call, the DTE transmission speed will be governed by the setting of the command.

  • Page 70: Parity Bits

    Chapter 14: DTE Interface Commands snd S-Register Settings 14.4.2 P ARITY Defined using the \P command as described below: None Even parity Odd parity Mark Space 14.4.3 N UMBER OF Defined using the \S command as described below: One stop bit Two stop bits 14.5 Communications Signaling Requirements The majority of communication software programs will accept the ISDN...

  • Page 71: Dtr Control

    ISDN TA/V 14.5.1 DTR C ONTROL Data Terminal Ready is the signaling circuit used to indicate to the ISDN TA/V when the attached computer/terminal is able to send or receive information. Whenever DTR is present on the DTE interface this is indicated by your ISDN TA/V’s TERMINAL LED being lit.

  • Page 72: Rts Control

    Chapter 14: DTE Interface Commands snd S-Register Settings 14.5.3 RTS C ONTROL Request To Send is the signaling circuit used to indicate to the attached ISDN TA/V that the computer/terminal wants to send information. How this signal is treated by the ISDN TA/V is determined by the &R command. &R0 Normal RS-232 signaling.

  • Page 73: Dcd Control

    ISDN TA/V 14.5.6 DCD C ONTROL Data Carrier Detect is the signaling circuit used to indicate to the attached computer/terminal that the ISDN TA/V has detected a valid carrier signal from the TA/V at the other end of the communications link. Whenever DCD is present on the DTE interface this is indicated by one or both of your ISDN TA/V’s ON-LINE LEDs being alight.

  • Page 74: User Commands

    Chapter 15: User Commands 15. User Commands This chapter concentrates on the AT commands and S-Register settings that affect the dialing characteristics of your ISDN TA/V, as they are effected from your computer or terminal. The existing setting for an S-Register can be displayed using the ATSn?<CR>...

  • Page 75: Effect Of The Break Key On A Terminal's Keyboard

    ISDN TA/V 15.2.1 AT E SCAPE ESPONSE IMEOUT EFINITION S-Register S12 defines the time in 20-millisecond increments following the third escape character that the ISDN TA/V will wait before issuing an OK response. If one or more characters are received within this period the OK response will be suppressed.

  • Page 76: Command Character Echo

    Chapter 15: User Commands 15.4 Command Character Echo The E command is used to determine whether command characters typed at your computer/terminal are echoed to your screen. Disables echo to the DTE. Enables echo to the DTE. 15.5 Defining the Command Terminator Key The keyboard character used to action a command is defined within S-Register S3 using the ASCII value of the required character.

  • Page 77: Defining The Line Feed Character Key

    ISDN TA/V 15.7 Defining the Line-Feed Character Key A line feed is the character used by the ISDN TA/V to make its output readable when the response codes are configured to be given in text format (see Section 13.5). The keyboard character used to action a line feed is defined within S-Register S4 using the ASCII value of the required character.

  • Page 78: Responding To At Commands

    Chapter 15: User Commands 15.9.3 D V.25 EFINING THE ERMINATOR HARACTER S-Register S64 is used to identify to the ISDN TA/V the line terminator character used by the DTE while in V.25bis command mode: S64=0 Carriage return + line feed characters. S64=1 Carriage return character.

  • Page 79: Reverting To Power-Up Configuration Settings

    ISDN TA/V 15.12 Reverting to Power-Up Configuration Settings The Z command resets the ISDN TA/V, loading the configuration settings stored in the power-up configuration location, in non-volatile memory: ATZ<CR> Note that using this command clears the command buffer, and therefore any commands which follow the Z in a command line are ignored.

  • Page 80: Isdn Line Dialing Characteristics

    Chapter 16: ISDN Line-Dialing Characteristics 16. ISDN Line-Dialing Characteristics This chapter focuses on the AT commands and S-Register settings that affect the dialing characteristics of your ISDN TA/V over the line. The existing setting for an S-Register can be displayed using the ATSn?<CR> command (where n is the S-Register number you are interested in).

  • Page 81: Enabling And Disabling Auto-Answering

    ISDN TA/V S41=43 V.110 rate set to 32000 bps. S41=44 V.110 rate set to 38400 bps. S41=45 V.110 rate set to 48000 bps. S41=46 V.110 rate set to 56000 bps. S41=47 V.110 rate set to 64000 bps. 16.2 Enabling and Disabling Auto-Answer The number of rings that the ISDN TA/V will wait before automatically answering a call is determined by the setting of S-Register S0.
  • Page 82 Chapter 16: ISDN Line-Dialing Characteristics 16.3.2 E NABLING ISABLING THE ISCONNECT ACILITY During a normal disconnect sequence your ISDN TA/V will ensure that its data buffers are emptied before dropping the call. When you issue a disconnect command, fast disconnect drops the call immediately without first emptying the data buffers.

  • Page 83: Error Correction, Flow Controldata Compression, Rate Adaption

    ISDN TA/V 17. Error Correction, Flow Control, Data Compression, Rate Adaption This chapter addresses the AT commands and S-Register settings that affect the method of error correction and flow control used by your ISDN TA/V. Use the ATSn?<CR> command (where n is the S-Register number you’re interested in) to display the existing S-Register setting.
  • Page 84 Chapter 17: Error Correction, Flow Control, Data Compression 17.1.1 E RROR ORRECTION EGOTIATION UFFER The \C command setting determines whether the answering ISDN TA/V stores received data in its memory buffers during the interval that an error- correction protocol is being negotiated between the two devices. No data is buffered during the error-correction negotiations.

  • Page 85: V.42Bis Data Compression Characteristics

    ISDN TA/V 17.2 V.42bis Data-Compression Characteristics Only used on links which are using the LAPM error-correction protocol, V.42bis data compression can increase the throughput rate of data by up to 300%. The "H command setting determines whether V.42bis data compression is used or not. "H0 V.42bis compression is disabled.

  • Page 86: Buffer Disconnect Timer

    Chapter 17: Error Correction, Flow Control, Data Compression Enables bidirectional RTS/CTS hardware flow control. Dropping RTS/CTS stops data flow. Raising RTS/CTS restarts it. Enables unidirectional software flow control from the ISDN TA/V to the DTE, using XON/XOFF characters. Enables unidirectional software flow control from the DTE to the ISDN TA/V, using XON/XOFF characters.

  • Page 87: V.25Bis Dialing Commands

    ISDN TA/V 18. V.25bis Dialing Commands V.25bis is an ITU communication standard which defines a means of initiating communications synchronously or asynchronously over a PSTN or ISDN line. V.25bis provides an alternative method of originating and answering calls when the communication environment calls for it. For example, when the ISDN TA/V has been configured for V.25bis operation, you use the commands supported by this standard to dial an ISDN number (similar to using the AT command D), store numbers (similar to the AT command...

  • Page 88: Call Responses

    Chapter 18: V.25bis Dialing Commands 18.2 Call Responses A call response indicates if the command was accepted by the ISDN TA/V. Call response includes call failure indication (CFI) and call connecting (CNX). 18.2.1 C (CFI) AILURE NDICATION The CFI response is issued to the DTE if the ISDN TA/V fails a CRN or CRS command.

  • Page 89: Call Answer Commands

    ISDN TA/V 18.3 Call Answer Commands 18.3.1 I (INC) NCOMING ESPONSE The INC response informs the DTE that the ISDN TA/V has detected a ring tone. At this point, the DTE can issue the DIC command to disable the ISDN TA/V from answering the call.

  • Page 90: Requesting A List Of Stored Numbers (Rln)

    Chapter 18: V.25bis Dialing Commands 18.5 Requesting a List of Stored Numbers (RLN) The RLN command displays numbers stored in the ISDN TA/V’s directory location. If the RLN command is entered without specifying a directory location, then all directory locations and their numbers display. If a directory location is entered, then only that number displays.

  • Page 91: Reverting To At Command

    ISDN TA/V 18.8 Reverting to AT Command (BAK) The BAK command is used to revert from V.25bis command mode to AT command mode. Note that when the ISDN TA/V is in AT command mode it will not accept V.25bis commands. To revert to V.25bis command mode an appropriate data transmission mode command must be issued (see Section 14.1 for details).

  • Page 92: Appendix A - Dte Pin Assignments And Connecting Cables

    Appendix A Appendix A — DTE Pin Assignments and Connecting Cables Your ISDN TA/V is equipped with a serial interface marked DTE, which physically presents the characteristics of a DCE and supports any of the ITU recommendations V.24/V.28, X.21/V.11, and V.36, according to the wiring configuration of the connected cable.
  • Page 93 ISDN TA/V V.24/V.28 Interface Characteristics One cable for is included with your ISDN TA/V for connecting the DTE interface to a V.24/V.28 device supporting data rates up to 19200 bps. The pinning for that cable is shown below: DB25 Male DB25 Female Connector Connector...
  • Page 94 Appendix A V.36 Interface Characteristics The required cable when connecting the DTE interface to a KiloStream service or device supporting V.36 interface characteristics at a data rate of up to 48000 bps is: DB25 Male 34-pin M-Block Connector Female Connector Pin Number Signal name Pin Number...

  • Page 95: Appendix B - At Command Summary

    ISDN TA/V Appendix B — AT Command Summary AT commands are issued from an asynchronous DTE, such as a PC, and are used to control the ISDN TA/V’s operating and software configuration. They can be issued from the DTE interface attached computer, or from a dedicated terminal/computer attached to the CONTROL port.
  • Page 96 Appendix B Section Description 15.13 ISDN TA/V identification, where n is: Displays the ISDN TA/V product code. Requests a checksum of the ISDN TA/V’s firmware ROM. Validates the firmware checksum. Displays the ISDN TA/V serial number. Displays the model/product number. Displays the part number of main circuit board.
  • Page 97 ISDN TA/V Section Description 13.5 Extended response codes; dial tone detection and busy tone detection, where n is: Disables response codes 5-27. Enables response codes 5-16. Enables response codes 5-16. Enables response codes 5-16. Enables response codes 5-16. Adds EC suffix to response codes (20-27) if error correction is used.
  • Page 98 Appendix B Section Description &Cn 14.5.6 DCD control, where n is: DCD is forced on at all times. Standard RS232 signaling where DCD is on when the remote ISDN TA/V’s carrier signal is detected, and off when it is not detected.
  • Page 99 ISDN TA/V Section Description &Mn 14.1 Data transmission mode selection, where n is: Asynchronous mode using AT commands. Synchronous mode using AT commands. Sync operating mode where the ISDN TA/V dials the number stored in directory location 1 when the DTR signal (or Control) turns off then on, on the DTE interface.
  • Page 100 Appendix B &Sn 14.5.2 DSR control, where n is: DSR is forced on at all times. Normal RS-232 signaling is respected. DSR is turned off for 1 or 2 seconds upon a disconnection. The status of DSR follows DTR. The ISDN TA/V operates as per standard RS-232 signaling except that DSR comes on immediately when the ISDN TA/V has established the physical connection to the...
  • Page 101 ISDN TA/V Section Description &Wn 12.4.2 Save the active configuration to memory. &W stores it as the power-up configuration. Where n is: Stores the active configuration in User 1. Stores the active configuration in User 2. &Zn=x 13.2.1 Store ISDN numbers. The ISDN TA/V saves in directory location n (1 to 20) the numbers and associated dialing modifies entered for x (up to 40 characters).
  • Page 102 Appendix B Section Description 14.5.4 CTS control, where n is: CTS is forced on at all times. Normal RS-232 signaling. CTS is always on when the ISDN TA/V is off-line, CTS follows RTS when on-line. CTS is turned off for 1 or 2 seconds upon a disconnection.
  • Page 103 ISDN TA/V Section Description 15.3 The data within the ISDN TA/V’s buffers is sent to the remote ISDN TA/V, followed by the break character, although the ISD TA/V remains in data mode. 17.1 Error-correction mode, where n is: Strict V.110 rate adaption is employed with a maximum asynchronous data rate of 19200bps.
  • Page 104 Appendix B Section Description 17.3 Bidirectional RTS/CTS hardware flow control is used. Enables unidirectional software flow control from the ISDN TA/V to the DTE, using XON/XOFF characters. Enables unidirectional software flow control from the DTE to the ISDN TA/V, using XON/XOFF characters. Enables unidirectional hardware flow control from the DTE to the ISDN TA/V, using RTS signal.
  • Page 105 ISDN TA/V Section Description 14.4.3 Number of stop bits, where n is: One stop bit. Two stop bits. 16.3.4 No data disconnect timer. The value of n defines the no data disconnect time in 1-minute increments between 1 and 255. A value of 0 disables the facility. 17.3.1 XON/XOFF passthrough flow control.

  • Page 106: Appendix C - S-Register Summary

    Appendix C Appendix C — S-Register Summary S-Registers affect the operating parameters of your ISDN TA/V and are only applicable when the DTE dialer type configuration option is set for AT command (using the &Q or &M command). To display the existing value of an S-Register type: ATSn?<CR> where n is the register number.
  • Page 107 ISDN TA/V (S-Register Summary, Cont.) Reg Section Description Default Range 16.1 Data Transmission Rate 1 41 = 16000, 42 = 19200. 43 = 32000, 44 = 38400. 45 = 48000, 46 = 56000, 47 = 64000. 17.4 Buffer disconnect timer 10 1-255 (seconds), or 0 = immediate disconnect.

  • Page 108: Appendix D - Ascii Character Code Chart

    Appendix D Appendix D — ASCII Character Code Chart Decimal Binary Control ASCII Value Value Character Value 00000000 CTRL-@ 00000001 CTRL-A 00000010 CTRL-B 00000011 CTRL-C 00000100 CTRL-D 00000101 CTRL-E 00000110 CTRL-F 00000111 CTRL-G 00001000 CTRL-H 00001001 CTRL-I 00001010 CTRL-J 00001011 CTRL-K 00001100 CTRL-L...
  • Page 109 ISDN TA/V Decimal Binary Control ASCII Value Value Character Value 00100001 00100010 “ 00100011 00100100 00100101 00100110 & 00100111 ‘ 00101000 00101001 00101010 00101011 00101100 00101101 00101110 00101111 00110000 00110001 00110010 00110011 00110100 00110101 00110110 00110111 00111000 00111001 00111010 00111011 00111100 <...
  • Page 110 Appendix D Decimal Binary Control ASCII Value Value Character Value 01000111 01001000 01001001 01001010 01001011 01001100 01001101 01001110 01001111 01010000 01010001 01010010 01010011 01010100 01010101 01010110 01010111 01011000 01011001 01011010 01011011 01011100 01011101 01011110 01011111 01100000 ‘ 01100001 01100010 01100011 01100100 01100101 01100110...
  • Page 111 ISDN TA/V Decimal Binary Control ASCII Value Value Character Value 01101101 01101110 01101111 01110000 01110001 01110010 01110011 01110100 01110101 01110110 01110111 01111000 01111001 01111010 01111011 01111100 01111101 01111110 01111111 Delete...
  • Page 112 © Copyright 1995. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...

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