Understanding Isdn Communication Protocols | NETGEAR XM128 ISDN

Reference Guide for the Model XM128 ISDN Digital Modem

If the address-matching process is again unable to tell which protocol to use, the Model XM128 modem goes into the Multi Auto-answering Routine by examining the B channel data pattern and, hence, determining the protocol to use.

When alerted, the Model XM128 modem sends a RING message to the DTE in the following format:

RING

FM:17145522863TO:17142630398

Understanding ISDN Communication Protocols

Table 6-5 shows the specifications of different ISDN protocols.

Table 6-5.	ISDN protocol specifications

Parameter		V.110	V.120	X.75

Layer 1		80 Bits Framing	HDLC	HDLC

Layer 2		None	LAPD	LAPB Transparent

Layer 3		None	V.120	ISO8208T.70 NL

Error Control		No	Yes	Yes

V.42bis		No	Yes	Yes

Async or Sync if used		Async Only	Async Only	Async Only
with V-Series DTE

Bundle		No	Yes	Yes

Max. Line Speed		Async: 38.4 Kbps	64 Kbps	64 Kbps
		Sync: 64 Kbps	128 Kbps	128 Kbps

AT-Command		ATB10	ATB20	ATB00 Transparent
Configuration				ATB01: T.70 NL

ISDN Overview

6-9

Image 57

NETGEAR XM128 ISDN manual Understanding Isdn Communication Protocols, Isdn protocol specifications, Parameter 110 120

Contents

USA NETGEAR, Inc Trademarks Statement of ConditionsEN 55 022 Declaration of Conformance Certificate of the Manufacturer/Importer Bestätigung des Herstellers/ImporteursVCCI-2 Statement Customer Support 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 Conventions Special Message FormatsUse of Enter, Type, and Press Manual contents Related PublicationOther Conventions DSU Manuals Chapter Introduction Features Reference Guide for the Model XM128 Isdn Digital Modem Front Panel Interface OptionsInterface options LED descriptions Label Color Activity DescriptionPWR DSR DTRRTS CTS Rear panel of the Model XM128 modem with S interface Rear Panel Rear panel components PowerLabel Description ON/OFFPage 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 Chapter Configuration Configuring Your Isdn Line and NetworkConfiguring Your Modem Using a Terminal Program Terminal programs Understanding AT CommandsOperating system Program Unix Quick Tips for Issuing AT Commands Supported AT command typesType of AT command Example Using AT Commands to Verify Modem Response Communication Speed SetupResult codes commands Command Description 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 AT commands for setting MSN AT commands for setting protocolsProtocol AT command Multiple subscriber number AT command Internet and Remote Access PPP and Slip Chapter Async to Sync PPPMaking Async to Sync PPP and Slip calls Keeping a Line Connection During Idle Time Model XM128 modem modem responds Making a call using Multilink PPP Answering Async to Sync PPP callsMultilink PPP Endpoint Discriminator Dialing Pre-stored Phone NumbersS85 register values Value Description Call Bumping Dynamic Channel Allocation Page Commands for Outgoing Calls Dialing Out Using Isdn ModeChapter Isdn Overview Dialing Out Using Isdn Mode Optional Speech Bearer Service Manually Switching Communication ModesDialing Out for Analog Adapter Port Call placing commands Dialing commandsAT Command Dial string it maps to Placing the Call 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 Best-effort call answering bit commands Ambiguity Resolution Switch for Voice CallsCommand Function Multi Auto-Answering of Data Calls Isdn protocol specifications Understanding Isdn Communication ProtocolsParameter 110 120 AT Command Description Configuration commandsIsdn Communications Answering a V.110 Call 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 Isdn Communications Europe Answering an X.75 CallMaking 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 Control of Outgoing Service Indicator Register values and functionsS108+n= Function Outgoing low-layer compatibility commands Control of Isdn Phone Numbers and SubaddressesS108.n= Function 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 Point-to-Point Configuration Placing a CallPlacing a Call for DSS1 Placing a Call for 1TR6 User-To-User Information Page Chapter Analog Call Handling Frequently used AT commands AT Commands for Analog CallsFrequently used AT commands European switches AT Command Description of command Placing a Call from the Analog Adapter Making and Receiving Analog Calls Accepting an Incoming Call Upgrading with Flash Eprom Chapter Modem UpgradeDefinitions for the d modifier Modifier Definition Kernel Mode Upgrade Instructions Power-on Self-test Chapter TroubleshootingTest Sequence Test Description Loopback Tests Isdn Loopback test AT&T9Loopback with Self-test AT&T10 B1/B2 Loopback with Self-test Diagnostic Command Using The Embedded Protocol Analyzer Modem Reset Capturing the Protocol Data Setting up the Embedded EPA Commands for analyzing captured data EPA CommandsAnalyzing the Captured Data Atct Key Function Description Control key functionsPage General Specifications Appendix a Technical SpecificationsNetwork Protocols and Standards Compatibility Security Physical Specifications Power AdapterEnvironmental Specifications Data Compression Security Types and Levels Appendix B Security Functions Level 2 Security Level 1 SecurityTable B-1 Types of security Type 1 Security Type 2 Security Level 3 Security Setting and Modifying PasswordsTable B-2 Levels of security Level Table B-3 Auto callback commands Nonpassword Auto Callback FunctionAT*GC0 AT*GC1 Appendix C AT Command Set Reference Operation Mode of the DTE InterfaceSimplex Mode AT Command Descriptions Table C-1 Basic AT command setCommand Options Function and description CE1 CE0CH? CL? CP0 CP1Dtmf USA Model XM128 modem returns result code SPID0 Description of ATI3 OutputSPID1 SPID? Table C-2 ATI3 command output Table C-3 Extended AT& command setOutput parameter Output value description 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 Table D-1 Binary conversion table Table D-2 Setting bitBit Binary Decimal Hexadecimal Value Operation Example Decimal Hexadecimal Binary Command Function and description Default Register DescriptionsTable D-3 Basic S-registers ATSn=x 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 Result Code Chart Symbol Reference Table D-6. Result code chartSupported Result Code Field Descriptions Table D-7 Result code field descriptionsField name Possible values 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 Appendix F Serial Port Interface Signal/pin description Signal direction Signal nameRS-232 Serial Interface Table F-1 Serial port interface Table F-2 Asynchronous flow control cable connection Asynchronous Cable ConnectionsTXD RXD RTS CTS DSR CD DCD DTR 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