Selecting V.120 for European Isdn DSS1 Switch | NETGEAR XM128 ISDN

Reference Guide for the Model XM128 ISDN Digital Modem

The highest asynchronous V.110 user rate depends on bit 4 of S119 as follows:

•S119.4=0 (19.2 Kbps)

•S119.4=1 (38.4 Kbps for areas other than Japan)

•S119.4=1 (57.6 Kbps for Japanese version)

If the DTE speed is higher than what has been set, the user rate in Table 6-6 is used.

The X bits in the 80-bit frame are used for remote flow control.

V.120 ISDN Communications

This section describes how to set up and configure your Model XM128 modem with the V.120 ISDN protocol. Refer to Table 6-5 on page 6-9 for the ISDN protocol specifications.

Selecting V.120 for European ISDN (DSS1) Switch

With European ISDN, V.120 is an option in the bearer capability (BC) information element, which is a mandatory information element in the setup message. Although we can specify V.120 in the low-layer compatibility (LLC) information element, some switches just do not deliver the LLC. Other switches do deliver the LLC, but the V.120 selection is discarded midway.

If the called modem does not get any B channel protocol information from the incoming setup message and the remote device is a NETGEAR ISDN device, the Model XM128 modem can identify the V.120 protocol automatically with the Multi Auto-answer Routine. Otherwise, the handshake fails.

Selecting V.120 for German National ISDN (1TR6)

With a 1TR6 switch, data connections are achieved by setting the Service Indicator to 7 (Daten_bertragung 64Kbps) and using the Additional Information octet to select B channel protocols. Because there is no predefined code for asynchronous V.120, the Model XM128 modem uses the synchronous V.120 code to fill in the additional information octet. This approach might not work all the time.

ISDN Overview

6-11

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NETGEAR XM128 ISDN manual Selecting V.120 for European Isdn DSS1 Switch, Selecting V.120 for German National Isdn 1TR6

Contents

USA NETGEAR, Inc EN 55 022 Declaration of Conformance TrademarksStatement of Conditions Customer Support Bestätigung des Herstellers/ImporteursCertificate of the Manufacturer/Importer VCCI-2 Statement World Wide Web Bulletin Board Service 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 Xiii Tables 10-1 Table F-1 Xvi Tables Purpose Preface Use of Enter, Type, and Press ConventionsSpecial Message Formats Other Conventions Manual contentsRelated Publication DSU Manuals Chapter Introduction Features Reference Guide for the Model XM128 Isdn Digital Modem Interface options Front PanelInterface Options PWR LED descriptionsLabel Color Activity Description CTS DTRDSR RTS Rear panel of the Model XM128 modem with S interface Rear Panel ON/OFF PowerRear panel components Label DescriptionPage Package Contents Chapter Installation Model XM128 modem connections Installing the Modem Verifying Hardware Installation Page Selecting the Appropriate Windows 95 Driver INF file Setup for Windows 95 and Windows NT Click on Close Configuring Your Modem Using a Terminal Program Chapter ConfigurationConfiguring Your Isdn Line and Network Unix Understanding AT CommandsTerminal programs Operating system Program Type of AT command Example Quick Tips for Issuing AT CommandsSupported AT command types Command Description Communication Speed SetupUsing AT Commands to Verify Modem Response Result codes commands Switches supported by the Model XM128 modem Switch Type Setup for North America Type ATSPIDO=n and Enter Spid Setup for North America Entering DNs Setup for Europe and the United Kingdom Multiple subscriber number AT command AT commands for setting protocolsAT commands for setting MSN Protocol AT command Making Async to Sync PPP and Slip calls Internet and Remote Access PPP and SlipChapter Async to Sync PPP Keeping a Line Connection During Idle Time Model XM128 modem modem responds Multilink PPP Making a call using Multilink PPPAnswering Async to Sync PPP calls Value Description Dialing Pre-stored Phone NumbersEndpoint Discriminator S85 register values 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 Placing the Call Dialing commandsCall placing commands AT Command Dial string it maps to Digital Data Commands for Incoming Calls Determining the Packet Length Commands for assigning Isdn numbers Answering a Call Using MSN Best-effort Call Answering Data over Speech Channel Multi Auto-Answering of Data Calls Ambiguity Resolution Switch for Voice CallsBest-effort call answering bit commands Command Function Parameter 110 120 Isdn protocol specificationsUnderstanding Isdn Communication Protocols Answering a V.110 Call Configuration commandsAT Command Description Isdn Communications Selecting V.120 for German National Isdn 1TR6 Selecting V.120 for European Isdn DSS1 Switch Making a V.120 Call Answering 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 Call Control for DSS1 Chapter Advanced Isdn 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 Control of EAZ Endgeräteauswahlziffer Command Function Answering a Call for DSS1 Answering a Call Best-effort Call Answering Answering a Call for 1TR6 Multi-Auto-Answering of Data Calls Ambiguity Resolution Switch for Voice Calls Data Call Indication Disable Inbound Call Connection 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 Command Description of command AT Commands for Analog CallsFrequently used AT commands Frequently used AT commands European switches Placing a Call from the Analog Adapter Making and Receiving Analog Calls Accepting an Incoming Call Modifier Definition Chapter Modem UpgradeUpgrading with Flash Eprom Definitions for the d modifier Kernel Mode Upgrade Instructions Test Description Chapter TroubleshootingPower-on Self-test Test Sequence Loopback with Self-test AT&T10 Loopback TestsIsdn Loopback test AT&T9 B1/B2 Loopback with Self-test Diagnostic Command Using The Embedded Protocol Analyzer Modem Reset Capturing the Protocol Data Setting up the Embedded EPA Atct EPA CommandsCommands for analyzing captured data Analyzing the Captured Data Key Function Description Control key functionsPage Security Appendix a Technical SpecificationsGeneral Specifications Network Protocols and Standards Compatibility Data Compression Power AdapterPhysical Specifications Environmental Specifications Security Types and Levels Appendix B Security Functions Type 1 Security Type 2 Security Level 1 SecurityLevel 2 Security Table B-1 Types of security Level Setting and Modifying PasswordsLevel 3 Security Table B-2 Levels of security AT*GC1 Nonpassword Auto Callback FunctionTable B-3 Auto callback commands AT*GC0 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 CL? CE0CE1 CH? Dtmf CP0CP1 USA Model XM128 modem returns result code SPID? Description of ATI3 OutputSPID0 SPID1 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 Extended AT* command set Table C-4 lists the extended AT* command set Appendix D Status Registers and Result Codes Viewing and Setting S-Registers Examples for Setting S-Registers Setting S-Registers Operation Example Decimal Hexadecimal Binary Table D-2 Setting bitTable D-1 Binary conversion table Bit Binary Decimal Hexadecimal Value 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 ATX2 ATX3 ATX4 ATX1 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 ATXn Result Code Option Table Table D-5 ATXn command setting options 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 Table D-8 Connect strings Connect Strings for Error Corrected ConnectionsPage RJ-45 Plug and Connector Appendix E Connector Pin Assignments RCV + XMT + Pin Assignment Table E-3. RJ-11 connector pin assignments RJ-11 Plug and ConnectorPage Table F-1 Serial port interface Signal/pin description Signal direction Signal nameAppendix F Serial Port Interface RS-232 Serial Interface CD DCD DTR Asynchronous Cable ConnectionsTable F-2 Asynchronous flow control cable connection TXD RXD RTS CTS DSR Isdn Overview Appendix G Isdn Reference Basic Rate Interface Out-of-Band Signaling Isdn Basic Rate Interface Points Terminal Adapter or Digital Modem Spid Setup Ordering Isdn Service Reference Guide for the Model XM128 Isdn Digital Modem Table G-1 Isdn line configuration Order Form for AT&T 5ESS Switch NI-1 Isdn Table G-2 Isdn line configuration Order Form for DMS-100 Switch NI-1 or Custom Isdn Order Form for Ewsd NI-1 Isdn Table G-3 Isdn line configuration Numerics Index Isdn Reference Guide for the Model XM128 Isdn Digital Modem Reference Guide for the Model XM128 Isdn Digital Modem