Eicon Networks DIVA T/A ISDN Modem manual What is Multilink PPP?

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What is ISDN?

What is Multilink PPP?

Multilink PPP combines two 64 Kbps ISDN channels to provide a maximum transmission speed of 128 Kbps. The DIVA T/A serves as an intermediary between its host workstation and the remote device to which data is being transmitted. All the protocol processing required for the negotiation of a Multilink PPP connection is performed on the DIVA T/A itself. The PC forwards asynchronous PPP packets to the DIVA T/A which, in turn, converts the packets for synchronous transmission and negotiates the various authentications required to establish the Multilink PPP connection with the target system over ISDN lines. This allows for the more efficient use of the ISDN line without requiring any changes to the PPP stack currently loaded on your PC.

DIVA T/A supports COM port rates of up to 230.4 kbps. However, some computer COM ports are limited to 115.2 kbps. If you want to use your DIV AT/A at its maximum speed, install a “fast COM port” card (UART 16650 based).

DIVA T/A ISDN Modem Reference Guide ◆ Page 9

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Contents Diva T/A Isdn Modem Reference Guide Eight Edition July 206-193-08 Contents Diva T/A Isdn Modem Reference Guide What is ISDN?What is ISDN? Channel Isdn Communication ChannelsChannel Basic Rate Access Connecting to Isdn BRI and PRIWhat is Multilink PPP? What is BACP/BOD? What is DBA? What is Always On / Dynamic Isdn AO/DI? What is Data Compression? Locating AT Commands Locating AT Commands AT Command Groups Alphabetical List of Supported AT Commands Alphabetical List of Supported AT Commands AT! CommandsAlphabetical List of Supported AT Commands AT% Commands AT& Commands AT* Commands AT Commands AT@ Commands Other AT Commands Registers AT$ Utility Commands Mini-monitor Commands General AT Commands General AT Commands Isdn Configuration Commands DefaultsValues for n Isdn Configuration Commands Default1 None defaultINS-Net64, NI-1, or 5ESS, µ law will be used default AT!D3=nAT!N2=n Default null string this is an optional valueNumber. Numbers are separated by a semicolon AT!N3=nFor more details, refer to the Rvscom documentation AT!X56=nOn region 255 do not attempt 56k data call retry COM Port Configuration Commands Ring COM Port Configuration CommandsUpon connection, the Diva T/A reports the DCE speed For example, ConnectCall Control Commands ATA Call Control CommandsATH Configuration Commands Configuration Commands AT!V0=n Use the default settingsProfile Commands Multilink PPP Commands Multilink PPP Commands Endpoint Discriminator Class/Address AT%M3=b3c665ac11Internet Protocol IP Always On / Dynamic Isdn AT Commands Always On / Dynamic Isdn AT Commands Will be opened after the delay specified by AT!X10 AT!X13=n when Bacp is disabled, seeDefault 1000 bytes AT!X14=nDefault AT!X22=n Default values for each setting, and is defined as followsAT!X18 Defined as followsAT!X25=n Default CF PPP overConnection numbers affects the range ofAT!X21. SeeAT!X21 AT!X26=nUtility Commands Internal TA access command reserved for VU Utility CommandsStart or display the Result of a Lapd trace Start or Display the Result of a PPP traceEnter the monitor on the next reset Soft reset the unit and enter the monitorStart an AO/DI X.25 Trace AT? Register CommandsRegister Commands Analog Device Commands AT*Fn Analog Device CommandsDisable. Recommended for modem/fax calls To be disabledEnable with default values default Enable using same terminal endpoint identifier as data portMini-monitor Commands AT Command Result Codes AT Command Result Codes ConnectCarrier Connect Connect 75T/1200R Protocol Transparent ModeConnect 1200T/75R Protocol NoneBACP/BOD Index