Multilink PPP | ZyXEL Communications omni series guide

Multilink PPP

There are two B channels in basic rate ISDN. This offers the possibility of opening multiple simultaneous channels between systems giving users additional bandwidth on demand. Multilink PPP is a method for bundling both B channel into one PPP link for higher throughput. It must be negotiated in the link establish phase by both peers. If Multilink PPP is negotiated successfully, the second link will be dialed after the first link reach network phase. In some countries the directory number is not the same for both channels. For dialing the second B channel with a different directory number, both numbers must be obtained before dialing out unless the peer supports BACP/BAP, which will be described later in this chapter. Multilink

PPPis described in RFC1990. Related commands:

∙AT&J3 - Enable Multilink PPP.

∙ATDI<num1>[+<num2>] - Dial Multilink PPP with num1 twice or with num1 and num2 if they differ.

∙ATS61.3 = 0 - Use rotate method to bundle both channels (default).

∙ATS61.3 = 1 - Use split method to bundle both channels.

∙ATEPDn = <num> - Set End Point Discriminator (EPD) for class n (0-5). I is not required to change the default settings in most cases unless your ISP provides these values.

Call bumping

You can place or answer a voice call from a device that is attached to one of the POTS ports while Multilink PPP is active. The omni drops one of the channels automatically and uses it for voice calls. Once a voice call ends, the TA automatically reestablishes the channel. For fully disconnecting with the central switch, there is a delay time between on-hook phone and channel reestablishment. The delay for reestablishing the channel is 10 seconds. During call bumping, the

Point-to-Point Protocol (PPP) 47

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ZyXEL Communications omni series user manual Multilink PPP

Contents

ZyXEL ZyXEL Limited Warranty Acknowledgments FCC Part 15 InformationCopyright 1997 by ZyXEL Page ∙ E-mail Contacting ZyXELPage Contents Incoming Calls Understanding AT CommandsInstalling the Windows 95 Driver INF file Outgoing Calls Placing outgoing calls Configuring Windows 95 Dial-Up Networking Capi InstallationIntroduction Feature list Error Correction and Data Compression with Call Control for 1TR6 Old German Isdn Answering an X.75 call Making an X.75 CallInvoking V.42bis Data Compression Call Control for DSS1 Upgrading with Flash Eprom Diagnostics 100Resetting The omni 103 Using The Embedded Protocol Analyzer Placing a Call Register Descriptions 127 AT Command Descriptions 109Viewing and Setting S-Registers 125 Introduction Speed and Compatibility Key Features of the omniKey to Model Differentiation Technical Specifications Intelligent Features Interface Option Physical CharacteristicsUnpacking Your omni How to Become a Registered Owner Introduction Front Panel Installing omni External ModelsLED Indicators Page Back Panel Front Panel Switch Connecting to Your Computer Connecting to the Power Supply Connecting the omni.net to Your Computer Interface Model Connecting to Your Isdn Line Interface Power On and Self Diagnostics Installing omni External Models Selecting the Baud Rate Multiplier Installing omni Internal Models Plug and Play Connecting the TA to your PC Press Y to continue Following message will appear Connecting to Your Isdn Line Interface Model Omni.net Internal Card Installation S/T interface Type A\setup.exe and press Enter Configuring Your Isdn Line and NetworkConfiguring Your TA Configuring your TA using a Terminal program TA should respond Type Page Configuring Your Isdn Line and Network Isdn Communication Basics Understanding AT Commands Type of AT Command Example Supported AT command typesQuick Tips when issuing AT commands ATV0 Dialing out using Isdn modeCommand Description Outgoing Calls Dialing out for Analog Adapter Port 2 omni.net Dialing out for Analog Adapter Port 1 omni.net InternalDialing out for Analog Adapter Port 1 omni.net Placing the Call Manually switching communication modes non-dataAT Command Dial string it will map to Incoming Calls Determining the Packet Length Digital Data Answering a Call using MSN AT&ZIn=s where ‘s’ is the MSN Best-effort call answering non-data Ambiguity resolution switch for voice calls omni.netCommand Function Data over Speech Channel Multi auto-answering of data calls Installing the Windows 95 Driver INF file Setup for Windows 95 and NTPage Page Configuring Windows 95 Dial-Up Networking Page Page IPX/SPX Compatible Click on TCP/IP Settings Capi Installation Page Introduction Point-to-Point Protocol PPP Async to Sync Conversion external Feature list Compression Control Protocol CCP Multilink PPP Bandwidth On Demand BOD BACP/BAP Point-to-Point Protocol PPP Answering a V.110 call 110 and Synchronous Mode Communications Synchronous Connections external AT Command DescriptionMaking V.110 Calls DIC 25bis Command SetCommand Messages CIC DTR Drop-Dialing Operation Indicator Messages AT*D0 56 V.110 and Synchronous Mode Communications Placing outgoing calls 120 Isdn Communications Configuring the V.120 mode Answering incoming calls Dialing in V.120 mode Making a Bundled Call with Speeds of 128KbpsIdentifying your line provisioning Dialing pre-stored phone numbers Error Correction and Data Compression with Bundle Connection with V.42bis Data Compression Selecting V.120 for European Isdn DSS1Selecting V.120 for Germany National Isdn 1TR6 Page 10 X.75 Isdn Communications Making an X.75 Call Answering an X.75 call ATDIphonenumber1+phonenumber2 Invoking V.42bis Data Compression Bundle Connection with V.42bis Data Compression 70 X.75 Isdn Communications AT&V7 Handling Analog Calls non-dataAT&V6 Placing a Call from the Analog Adapter European switch specific Scenarios of an Incoming Voice Call Outcome Accepting an Incoming Call AT Commands Description InterCom Feature Phone omni.netCommands Description Flash key Receiving a second call Call WaitingPlacing a second call Three-way Conference Call Call BrokerCall Reject Call Transfer HFlash è H#3 Call Control for DSS1 Control of Outgoing Service IndicatorAdvanced Isdn Call Control S108.n= Function S108+n= FunctionS80 bit ‘n’ as follows = YnNnown-number/Znown-Subaddress Control of Isdn Phone Number and Sub-address Call Control for 1TR6 Old German Isdn G3 Fax Control of Endgerä Teauswahlziffer EAZModem Command Function Answering a Call for DSS1 Answering a Call Best-effort Call Answering Answering a Call for 1TR6 Data Call Indication Ambiguity Resolution Switch for Voice Calls non-dataMulti-Auto-Answering of Data Calls Disable inbound call connection ATDxYnNncalledpartynumber/Zncalled-party- subaddress Point-to-Point ConfigurationPlacing a Call Placing a call for DSS1 Placing a call for 1TR6 Leased Line Isdn ATAB1 ATDB1ATDB2 ATDB3 Security Types and Levels Security Functions Level Level 1 securityLevel 2 security Level 3 security Setting and Modifying Passwords Non-password Auto Call Back Function Security Functions Upgrading with Flash Eprom Upgrading Your omni Kernel Mode Test Description DiagnosticsDiagnostics Test Loopback with Self-test AT&T10 Power-on Self-testIsdn Loopback test AT&T9 B1/B2 Loopback with Self-test AT&T11 Diagnostic Command Atcg Using The Embedded Protocol Analyzer Resetting The omni Capturing the Protocol Data CB1 CD0CD1 CB0 Key Function Description ATC$ Diagnostics Operation Modes of the DTE Interface AT Command Set ReferenceSimplex mode Multiplex mode Basic AT Command Set AT Command Descriptions All the Following Commands Require a AT Prefix Command Options Function & Description CE0 BP0BP1 CP0 CE1CH? CL? Command Options Function & Description DN? DB1DB2 DB3 USA ATI SPID? IsdnSPID0 SPID1 Output Parameter Output Value Description Description of ATI3 OutputUPX Extended AT& Command Set Isdn Command Options Function & Description Command Options Function & Description Extended AT* Command Set Command Options Function & Description AT Command Set Reference Viewing S-registers Viewing and Setting S-RegistersStatus Registers and Result Codes Setting S-registers Not Register DescriptionsBit Binary value Decimal value Hexadecimal value Operation Example-1 Example-2 Binary Dec Hex Extended S-Registers ATSn=x Command Function & DescriptionCommand Bit Dec Hex Function and description Basic S-Registers ATSn=x Command Bit Dec Hex Function and description ATX2 ATX3 ATX4 ATX0ATX1 Command Bit Dec Hex Function and description Command Bit Dec Hex Function and description Command Bit Dec Hex Function and description Complete Command Bit Dec Hex Function and description Enable loopback 4 test DCA function enabled Command Bit Dec Hex Function and description SI= Fernsprechen analog 48000 bps PPP/MLPPP Command Bit Dec Hex Function and description PPP ATV0 ATV1 ATXn Result Code Option Table Connect Field Name Possible Values Result Code Chart Symbol ReferenceResult Code Field Descriptions Connect Strings for Error Corrected Connections Status Registers and Result Codes Phone Jack Pinout Assignments Not Connected Phone Jack Pinout Assignments DCE Signal/Pin Number Description Direction NameSerial Port Interface Pin CD DCD DTR DTEMAC TXD RXD RTS CTS DSR Index Index Bundled Index