Model XM128 modem modem responds | NETGEAR XM128 ISDN guide

Reference Guide for the Model XM128 ISDN Digital Modem

Most of the time, you only use this protocol for making calls to remote sites with ISDN LAN Routers. If the remote access site you are calling uses a Terminal Adapter such as the Model XM128 modem, you can use V.120, as it provides data compression.

Before making the call, check which protocol is set for the ISDN mode using the &V command to view the settings.

When you are ready to view the settings type:

AT&V<Enter>

The Model XM128 modem modem responds:

Current Settings...

Switch Type: Northern Telecom DMS

ISDN Outgoing Service: PPP Async-to-Sync Conv 64K

If the settings displayed match your current setup, you are ready to place the call.

When you are ready to place the call type:

ATDI<remote_access_number><Enter>

The Model XM128 modem responds:

Connect 115000/64000 PPP/None

Keeping a Line Connection During Idle Time

If you are using PPP to access a server the server probably has a watchdog timer to monitor the line activity. If the idle time exceeds some time interval (usually 1 minute), the server releases the connection for other clients to dial in. Users may suffer some inconvenience because you have to dial to the server again and repeat the login procedure when disconnected. The value in register S124 (in seconds) is used as the idle time gauge. If the idle time exceeds this guarding period, the Model XM128 modem sends out a dummy PPP packet to the server to keep it from disconnecting the line.

Example: If the server you are calling disconnects after 1 minute of inactivity, issue the following command before connecting:

ATS124=59<Enter> (send dummy PPP packet after 59 seconds of inactivity)

Setting S124=0 disables this function.

5-2	Async to Sync PPP

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NETGEAR XM128 ISDN manual Model XM128 modem modem responds, Keeping a Line Connection During Idle Time

Contents

NETGEAR, Inc USA EN 55 022 Declaration of Conformance TrademarksStatement of Conditions 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 Use of Enter, Type, and Press ConventionsSpecial Message Formats Other Conventions Manual contentsRelated Publication Manuals DSU Features Chapter Introduction Reference Guide for the Model XM128 Isdn Digital Modem Interface options Front PanelInterface Options PWR LED descriptionsLabel Color Activity Description 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 Modem Using a Terminal Program Chapter ConfigurationConfiguring Your Isdn Line and Network Understanding AT Commands Terminal programsOperating system Program Unix Type of AT command Example Quick Tips for Issuing AT CommandsSupported AT command types 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 Making Async to Sync PPP and Slip calls Internet and Remote Access PPP and SlipChapter Async to Sync PPP Model XM128 modem modem responds Keeping a Line Connection During Idle Time Multilink PPP Making a call using Multilink PPPAnswering Async to Sync PPP calls Dialing Pre-stored Phone Numbers Endpoint DiscriminatorS85 register values Value Description Call Bumping Dynamic Channel Allocation Page Chapter Isdn Overview Commands for Outgoing CallsDialing Out Using Isdn Mode Dialing Out for Analog Adapter Port Dialing Out Using Isdn Mode Optional Speech Bearer ServiceManually Switching Communication Modes 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 Parameter 110 120 Isdn protocol specificationsUnderstanding Isdn Communication Protocols 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 Making an X.75 Call Isdn Communications EuropeAnswering 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 S108+n= Function Control of Outgoing Service IndicatorRegister values and functions S108.n= Function Outgoing low-layer compatibility commandsControl of Isdn Phone Numbers and Subaddresses 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 for DSS1 Point-to-Point ConfigurationPlacing a Call 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 Loopback with Self-test AT&T10 Loopback TestsIsdn Loopback test AT&T9 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 Simplex Mode Appendix C AT Command Set ReferenceOperation Mode of the DTE Interface Command Options Function and description AT Command DescriptionsTable C-1 Basic AT command set CE0 CE1CH? CL? Dtmf CP0CP1 USA Model XM128 modem returns result code Description of ATI3 Output SPID0SPID1 SPID? Output parameter Output value description Table C-2 ATI3 command outputTable C-3 Extended AT& command set 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 Table D-3 Basic S-registers ATSn=x Command Function and description DefaultRegister Descriptions 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 Supported Result Code Chart Symbol ReferenceTable D-6. Result code chart Field name Possible values Result Code Field DescriptionsTable D-7 Result code field descriptions 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