Multi-Tech Systems FR3060, FR3100 manual MultiFRAD 3000-Series User Guide

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MultiFRAD 3000-Series User Guide

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LAPB: Link Access Procedure Balanced; based on the X.25 Layer 2 specification. A full-duplex point-to-point bit-synchronous protocol commonly used as a data link control protocol to interface X.25 DTEs. LAPB is the link initialization procedure that establishes and maintains communications between the DTE and the DCE.

LAPD: Link Access Protocol for the D-Channel; based on the ISDN Q.921 specification. A full-duplex point-to-point bit-synchronous link-level protocol for ISDN connections; different from LAPB in its framing sequence. Transmission is in units called "frames", and a frame may contain one or more X.25 packets.

Line Coding: The representation of 1s and 0s on a T1 line. The two methods of line coding commonly used, B8ZS and AMI, differ in the restrictions placed on user data. T1 line coding ensures that sufficient timing information is sent with the digital signal to ensure recovery of all the bits at the far end. Timing information on the T1 line is included in the form of 1s in the data stream; a long string of 0s in the data stream could cause problems recovering the data.

Line Termination (LT): The electronics at the ISDN network side of the user/network interface that complements the NT1 at the user side. The LT and the NT1 together provide the high-speed digital line signals required for BRI access.

Listed Directory Number (LDN): The main number assigned by the telco; the number listed in the telephone directory and also provided by Directory Assistance. Some devices can have more than one LDN, such as ISDN devices that have one LDN for voice and another LDN for data.

Local Area Network (LAN): 1. A computer network located on a user's premises within a limited geographical area. Communication within a local area network is not subject to external regulations; however, communication across the LAN boundary may be subject to some form of regulation. 2. A LAN does not use store and forward techniques. 3. A network in which a set of devices are connected to one another for a communication and that can be connected to a larger network.

Local Access and Transport Area (LATA): A post-divestiture geographical area generally equivalent to a Standard Metropolitan Statistical Area. At divestiture, the territory served by the Bell system was divided into approximately 161 LATAs. The Bell Operating Companies (BOCs) provide Intra-LATA services.

Local Exchange Carrier (LEC): The local phone company which provides local (i.e., not long distance) transmission services. AKA "telco". LECs provide T1 or FT1 access to LDCs (unless the T1 circuit is completely intra-LATA). Inter-LATA T1 circuits are made up of a combination of Access and Long Haul facilities.

Local Management Interface (LMI): A specification for frame relay equipment that defines status information exchange.

Local Loop: A transmission path, typically twisted-pair wire, between an individual subscriber and the nearest public telecommunica- tions network switching center. The wires provide ISDN service, but require an NT1 at the user end and an LT at the network end. (AKA, "loop" or "subscriber loop".)

Logical Link Control (LLC2): In a local area network, the protocol that governs the exchange of transmission frames between data stations independently of how the transmission medium is shared. The LLC2 protocol was developed by the IEEE 802 commitee and is common to all LAN standards.

Logical Unit (LU): A type of network accessible unit that enables end users to gain access to network resources and communicate with each other.

Long Haul: The T1 element that connects to the Access portion of the long distance company's (LDC's) central office. The LDC is commonly called the point of presence (POP). Each LDC has a number of POPs, located throughout the country. The LDC is also called an IEC (Inter Exchange Carrier).

Long Haul Communications: The type of phone call reaching outside of a local exchange (LE).

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Management Information Base (MIB): A database of network management information used by the Common Management Informa- tion Protocol (CMIP) and the Simple Network Management Protocol (SNMP).

Megacom: An AT&T service with a normal WATS line (typically T1) between the customer premise and the AT&T serving class 4 CO are the customer's responsibility.

MegaLink: BellSouth's leased T1 service.

Message: Associated with such terms as packet, frame, and segment. 1. In information theory, an ordered series of characters intended to convey information. 2. An assembly of characters and sometimes control codes that is transferred as an entry from an originator to one or more recipients.

Modem: A communications device that enables a computer to transmit information over a telephone line. It converts the computer's digital signals into analog signals to send over a telephone line and converts them back to digital signals at the receiving end. Modems can be internal and fit into an expansion slot, or external and connect to a serial port.

Multiplexer (Mux): 1. A device that takes several input signals and combines them into a single output signal in such a manner that each of the input signals can be recovered. 2. A device capable of interleaving the events of two or more activities or capable of distributing the events of an interleaved sequence to the respective activities. 3. Putting multiple signals on a single channel.

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Contents User Guide User Guide Record of Revisions RevisionDescriptionContents Appendices Introduction and Description Introduction MultiFRAD 3000-SeriesPreview of this Guide Ethernet Front Panel DescriptionComposite Link Voice/Fax Channels 1 Channels 1Channels 3 through Internal Composite Link T1 DSU Connector Power ConnectorFrame Ground GND Connector Monitor XMT/RCV ConnectorChannels 3 10 Connectors Voice/Fax Channels 1 8 ConnectorsChannel Connectors Technical SpecificationsCommand Port Voice/Fax Channel ConnectorsInstallation Valid Voice/Fax Channel Connections Safety WarningsUnpacking your MultiFRAD Cabling your MultiFRAD General Cable ConnectionsChannel Cable Connections Voice/Fax Cable Connections Jumper Block Positioning Procedure DefaultSoftware Loading and Configuration Loading your Software Software Loading and Configuration MultiFRAD 3000-Series User Guide IP Address Ethernet Mask Frame Type MultiFRAD 3000-Series User Guide Software Loading and Configuration MultiFRAD 3000-Series User Guide Software Loading and Configuration MultiFRAD 3000-Series User Guide Software Loading and Configuration MultiFRAD 3000-Series User Guide Detect and Map Your DLCIs MultiFRAD 3000-Series User Guide Build Your Phone Directory Database MultiFRAD 3000-Series User Guide Click Download Setup MultiFRAD 3000-Series User Guide MultiFRAD Software Before You Begin MultiFRAD Configuration Changing IP Parameters MultiFRAD Software MultiFRAD 3000-Series User Guide Changing IPX Parameters MultiFRAD 3000-Series User Guide MultiFRAD Software Changing Bridging Parameters WAN Port Setup Point to Point Setup Frame Relay Setup MultiFRAD 3000-Series User Guide MultiFRAD Software MultiFRAD 3000-Series User Guide MultiFRAD Software Data Port Configuration FXS Interface Changing Voice/Fax Channel ParametersInterface Interface Voice/FaxFXO Interface Regional Changing the Phone Directory Database Others Setup Enable Logging of Statistics Statistics IP Statistics IPX Port Statistics STP Spanning Tree Port StatisticsSnmp Statistics WAN StatisticsPPP Statistics Data Port Statistics Frame Relay Statistics MultiFRAD 3000-Series User Guide Remote Configuration and Management Remote Configuration Modem-BasedRemote Configuration and Management LAN-Based Warranty, Service and Tech Support Remote Management TelnetMultiFRAD Configuration MultiFRAD Management MenuWEB Browser Management Remote User DatabaseRemote Configuration and Management MultiFRAD 3000-Series User Guide Warranty, Service and Tech Support Limited Warranty On-line Warranty RegistrationContacting Tech Support via E-mail Tech SupportRecording MultiFRAD Information To log on to the Multi-Tech BBS ServiceMulti-Tech BBS To Download a fileAbout the Internet If you don’t know the file nameMultiFRAD 3000-Series User Guide Appendices Appendix a Cabling Diagrams Command Port Cable LAN CablesVoice/Fax Channel Connectors Trunk Cable RS232C/V.24 * Link CableRemote Configuration Cable Command PortAppendix B Regulatory Information Glossary MultiFRAD 3000-Series User Guide Glossary MultiFRAD 3000-Series User Guide Glossary MultiFRAD 3000-Series User Guide Glossary MultiFRAD 3000-Series User Guide Glossary 100 101 102 103 Index Remote Configuration
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