ZyXEL Communications omni series manual

Bundle Connection with V.42bis Data Compression

If both sites have set AT&K44 to enable V.42bis negotiation then XID frames will be exchanged through the main B channel which corresponds to the call established by the first SETUP message.

Only one data compression channel will be used in bundle connections. That means the compression is done before packet disassembly and the decompression is done after packet assembly. The compression ratio of V.42bis is commonly recognized as up to 4:1 for text files. If the line speed is 128K bps, then the DTE speed may reach 512K bps. This makes the DTE's normal RS-232 serial port unsuitable for bundle applications. A special I/O card on the computer side is required in this situation.

Selecting V.120 for European ISDN (DSS1)

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 don't deliver the LLC. Other switches do deliver the LLC, but the V.120 selection will be discarded midway.

If the called TA doesn't get any B channel protocol information from the incoming SETUP message and the remote device is a ZyXEL ISDN device, the TA will be able to identify the V.120 protocol automatically with the Multi Auto-answer routine. Otherwise, the handshake will fail.

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

1TR6 data connections are achieved by setting the Service Indicator to 7 (Daten_bertragung 64Kbps) and the Additional Information octet is used to select B channel protocols. Since there is no pre-defined code for asynchronous V.120, TA uses the

V.120 ISDN Communications 63

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ZyXEL Communications omni series Selecting V.120 for European Isdn DSS1, Selecting V.120 for Germany National Isdn 1TR6

Contents

ZyXEL ZyXEL Limited Warranty FCC Part 15 Information Copyright 1997 by ZyXELAcknowledgments 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 AT Command Descriptions 109 Viewing and Setting S-Registers 125Register Descriptions 127 Introduction Key Features of the omni Key to Model DifferentiationSpeed and Compatibility Technical Specifications Intelligent Features Physical Characteristics Unpacking Your omniInterface Option How to Become a Registered Owner Introduction Installing omni External Models LED IndicatorsFront Panel 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 Supported AT command types Quick Tips when issuing AT commandsType of AT Command Example ATV0 Dialing out using Isdn modeCommand Description Outgoing Calls Dialing out for Analog Adapter Port 1 omni.net Internal Dialing out for Analog Adapter Port 1 omni.netDialing out for Analog Adapter Port 2 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 AT Command Description Making V.110 CallsSynchronous Connections external 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 Speeds of 128Kbps Identifying your line provisioningMaking a Bundled Call with Dialing pre-stored phone numbers Error Correction and Data Compression with Selecting V.120 for European Isdn DSS1 Selecting V.120 for Germany National Isdn 1TR6Bundle Connection with V.42bis Data Compression 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 Handling Analog Calls non-data AT&V6AT&V7 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 Call Waiting Placing a second callReceiving a second call Three-way Conference Call Call BrokerCall Reject Call Transfer HFlash è H#3 Control of Outgoing Service Indicator Advanced Isdn Call ControlCall Control for DSS1 S108+n= Function S80 bit ‘n’ as followsS108.n= Function = YnNnown-number/Znown-Subaddress Control of Isdn Phone Number and Sub-address Call Control for 1TR6 Old German Isdn Control of Endgerä Teauswahlziffer EAZ ModemG3 Fax Command Function Answering a Call for DSS1 Answering a Call Best-effort Call Answering Answering a Call for 1TR6 Ambiguity Resolution Switch for Voice Calls non-data Multi-Auto-Answering of Data CallsData Call Indication 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 Power-on Self-test Isdn Loopback test AT&T9Loopback with Self-test AT&T10 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 BP0 BP1CE0 CP0 CE1CH? CL? Command Options Function & Description DN? DB1DB2 DB3 USA ATI SPID? IsdnSPID0 SPID1 Description of ATI3 Output UPXOutput Parameter Output Value Description 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 and Setting S-Registers Status Registers and Result CodesViewing S-registers 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 ATX0 ATX1ATX2 ATX3 ATX4 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 Result Code Chart Symbol Reference Result Code Field DescriptionsField Name Possible Values 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