Commands for Incoming Calls, Digital Data | NETGEAR XM128 ISDN

Reference Guide for the Model XM128 ISDN Digital Modem

Commands for Incoming Calls

When a call comes in, the call is carried by one of the following protocols:

•V.120

•HDLC PPP, MPPP, or SLIP

•V.110

•X.75

Or the call may be initiated by an analog device.

This section provides some general guidelines for setting up the Model XM128 modem for call answer handling. Be aware that the modem does not automatically answer a call unless S-register S0 is set to a value greater than 0 (zero). If S-register S0=0, the modem only reports RING to your terminal program. It can also respond with an audible tone that allows you to decide whether or not you should take any action.

When an ISDN data call comes in, the Model XM128 modem tries to negotiate a connection using the proper ISDN protocol. When an analog call comes in, the modem sends the call to the analog port as the factory default, PHONE 1, and then PHONE 2.

Digital Data

The Model XM128 modem currently supports Circuit Switched Data (CSD) for ISDN data applications. The CSD protocols supported by the Model XM128 modem include: PPP, MPPP, V.120, X.75, and V.110. PPP is the most popular protocol used in North America; it is used by most of the Internet service providers. After the Model XM128 modem answers a call, it examines the incoming data to determine which protocol to use and automatically switches to that mode. This process occurs transparently to the user. The Model XM128 modem is able to auto-switch for PPP, MPPP, V.120, X.75, and V.110 protocols over speech channel. In most cases, you can rely on the auto-switching feature for your applications. If you need more specific settings for answering calls, refer to “ Answering a Call Using MSN” on page 5-5.

6-4	ISDN Overview

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NETGEAR XM128 ISDN manual Commands for Incoming Calls, Digital Data

Contents

NETGEAR, Inc USA Statement of Conditions TrademarksEN 55 022 Declaration of Conformance Bestätigung des Herstellers/Importeurs Certificate of the Manufacturer/ImporterVCCI-2 Statement Customer Support Bulletin Board Service World Wide Web Contents Reference Guide for the Model XM128 Isdn Digital Modem Error Correction and Data Compression with Chapter Advanced Isdn Appendix a Technical Specifications Appendix E Connector Pin Assignments Figures Xii Tables Tables Xiii 10-1 Table F-1 Xvi Tables Preface Purpose Special Message Formats ConventionsUse of Enter, Type, and Press Related Publication Manual contentsOther Conventions Manuals DSU Features Chapter Introduction Reference Guide for the Model XM128 Isdn Digital Modem Interface Options Front PanelInterface options Label Color Activity Description LED descriptionsPWR DTR DSRRTS CTS Rear Panel Rear panel of the Model XM128 modem with S interface Power Rear panel componentsLabel Description ON/OFFPage Chapter Installation Package Contents Installing the Modem Model XM128 modem connections Verifying Hardware Installation Page Setup for Windows 95 and Windows NT Selecting the Appropriate Windows 95 Driver INF file Click on Close Configuring Your Isdn Line and Network Chapter ConfigurationConfiguring Your Modem Using a Terminal Program Understanding AT Commands Terminal programsOperating system Program Unix Supported AT command types Quick Tips for Issuing AT CommandsType of AT command Example Communication Speed Setup Using AT Commands to Verify Modem ResponseResult codes commands Command Description Switch Type Setup for North America Switches supported by the Model XM128 modem Spid Setup for North America Type ATSPIDO=n and Enter Setup for Europe and the United Kingdom Entering DNs AT commands for setting protocols AT commands for setting MSNProtocol AT command Multiple subscriber number AT command Chapter Async to Sync PPP Internet and Remote Access PPP and SlipMaking Async to Sync PPP and Slip calls Model XM128 modem modem responds Keeping a Line Connection During Idle Time Answering Async to Sync PPP calls Making a call using Multilink PPPMultilink PPP Dialing Pre-stored Phone Numbers Endpoint DiscriminatorS85 register values Value Description Call Bumping Dynamic Channel Allocation Page Dialing Out Using Isdn Mode Commands for Outgoing CallsChapter Isdn Overview Manually Switching Communication Modes Dialing Out Using Isdn Mode Optional Speech Bearer ServiceDialing Out for Analog Adapter Port Dialing commands Call placing commandsAT Command Dial string it maps to Placing the Call Commands for Incoming Calls Digital Data Determining the Packet Length Answering a Call Using MSN Commands for assigning Isdn numbers Data over Speech Channel Best-effort Call Answering Ambiguity Resolution Switch for Voice Calls Best-effort call answering bit commandsCommand Function Multi Auto-Answering of Data Calls Understanding Isdn Communication Protocols Isdn protocol specificationsParameter 110 120 Configuration commands AT Command DescriptionIsdn Communications Answering a V.110 Call Selecting V.120 for European Isdn DSS1 Switch Selecting V.120 for German National Isdn 1TR6 Answering a V.120 Call Making a V.120 Call Dialing in V.120 Mode Identifying Your Line Provisioning Kbps Speeds Answering an X.75 Call Isdn Communications EuropeMaking an X.75 Call Making a Bundled Call with Dialing Prestored Phone Numbers Bundle Connection with V.42bis Data Compression Page Chapter Advanced Isdn Call Control for DSS1 Register values and functions Control of Outgoing Service IndicatorS108+n= Function Control of Isdn Phone Numbers and Subaddresses Outgoing low-layer compatibility commandsS108.n= Function Reference Guide for the Model XM128 Isdn Digital Modem Call Control for 1TR6 Old German Isdn Command Function Control of EAZ Endgeräteauswahlziffer Answering a Call Answering a Call for DSS1 Answering a Call for 1TR6 Best-effort Call Answering Ambiguity Resolution Switch for Voice Calls Multi-Auto-Answering of Data Calls Disable Inbound Call Connection Data Call Indication Placing a Call Point-to-Point ConfigurationPlacing a Call for DSS1 Placing a Call for 1TR6 User-To-User Information Page Chapter Analog Call Handling AT Commands for Analog Calls Frequently used AT commandsFrequently used AT commands European switches AT Command Description of command Making and Receiving Analog Calls Placing a Call from the Analog Adapter Accepting an Incoming Call Chapter Modem Upgrade Upgrading with Flash EpromDefinitions for the d modifier Modifier Definition Upgrade Instructions Kernel Mode Chapter Troubleshooting Power-on Self-testTest Sequence Test Description Isdn Loopback test AT&T9 Loopback TestsLoopback with Self-test AT&T10 Diagnostic Command B1/B2 Loopback with Self-test Modem Reset Using The Embedded Protocol Analyzer Setting up the Embedded EPA Capturing the Protocol Data EPA Commands Commands for analyzing captured dataAnalyzing the Captured Data Atct Control key functions Key Function DescriptionPage Appendix a Technical Specifications General SpecificationsNetwork Protocols and Standards Compatibility Security Power Adapter Physical SpecificationsEnvironmental Specifications Data Compression Appendix B Security Functions Security Types and Levels Level 1 Security Level 2 SecurityTable B-1 Types of security Type 1 Security Type 2 Security Setting and Modifying Passwords Level 3 SecurityTable B-2 Levels of security Level Nonpassword Auto Callback Function Table B-3 Auto callback commandsAT*GC0 AT*GC1 Operation Mode of the DTE Interface Appendix C AT Command Set ReferenceSimplex Mode Table C-1 Basic AT command set AT Command DescriptionsCommand Options Function and description CE0 CE1CH? CL? CP1 CP0Dtmf USA Model XM128 modem returns result code Description of ATI3 Output SPID0SPID1 SPID? Table C-3 Extended AT& command set Table C-2 ATI3 command outputOutput parameter Output value description Result Codes Knn =phone number Table C-4 lists the extended AT* command set Table C-4 Extended AT* command set Viewing and Setting S-Registers Appendix D Status Registers and Result Codes Setting S-Registers Examples for Setting S-Registers Table D-2 Setting bit Table D-1 Binary conversion tableBit Binary Decimal Hexadecimal Value Operation Example Decimal Hexadecimal Binary Register Descriptions Command Function and description DefaultTable D-3 Basic S-registers ATSn=x Table D-4 Extended S-registers ATSn=x See also S-register ATX1 ATX2 ATX3 ATX4 S24= Bitmapped register S35= Bitmapped register When Data/Voice is pressed Do not send low-layer compatibility Enables loopback 4 test DCA function is enabled Reference Guide for the Model XM128 Isdn Digital Modem Reference Guide for the Model XM128 Isdn Digital Modem Reference Guide for the Model XM128 Isdn Digital Modem Message handling systems MHS Reference Guide for the Model XM128 Isdn Digital Modem Speed is greater than 19200 bps Table D-5 ATXn command setting options ATXn Result Code Option Table Connect Table D-6. Result code chart Result Code Chart Symbol ReferenceSupported Table D-7 Result code field descriptions Result Code Field DescriptionsField name Possible values Connect Strings for Error Corrected Connections Table D-8 Connect stringsPage Appendix E Connector Pin Assignments RJ-45 Plug and Connector Pin Assignment RCV + XMT + RJ-11 Plug and Connector Table E-3. RJ-11 connector pin assignmentsPage Signal/pin description Signal direction Signal name Appendix F Serial Port InterfaceRS-232 Serial Interface Table F-1 Serial port interface Asynchronous Cable Connections Table F-2 Asynchronous flow control cable connectionTXD RXD RTS CTS DSR CD DCD DTR Appendix G Isdn Reference Isdn Overview Out-of-Band Signaling Basic Rate Interface Terminal Adapter or Digital Modem Isdn Basic Rate Interface Points Ordering Isdn Service Spid Setup Reference Guide for the Model XM128 Isdn Digital Modem Order Form for AT&T 5ESS Switch NI-1 Isdn Table G-1 Isdn line configuration Order Form for DMS-100 Switch NI-1 or Custom Isdn Table G-2 Isdn line configuration Table G-3 Isdn line configuration Order Form for Ewsd NI-1 Isdn Index Numerics Isdn Reference Guide for the Model XM128 Isdn Digital Modem Reference Guide for the Model XM128 Isdn Digital Modem