Multi-Tech Systems FR3060, FR3100, FR3060/V4, FR3060/V8, FR3100/V4, FR3100/V8 manual Glossary

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Glossary

Digital Data: Information represented by discrete values or conditions (contrast "Analog Data").

Digital Loopback: A technique used for testing the circuitry of a communications device. Can be initiated locally, or remotely (via a telecommunications device). The tested device decodes and encodes a received test message, then echoes the message back. The results are compared with the original message to determine if corruption occurred en route.

Digital PBX: A Private Branch Exchange that operates internally on digital signals. See also "Exchange".

Digital Service, level 0 (DS0): The world-wide standard speed (64K bps) for digital voice conversation using PCM (pulse coded modulation).

Digital Service, level 1 (DS1): The 1.544M bps voice standard (derived from an older Bell System standard) for digitized voice transmission in North America. The 1.544M bps consists of 24 digitally-encoded 64K bps voice channels (north America) and 2.048M bps (30 channels) elsewhere.

Digital Signal: A discrete or discontinuous signal (e.g., a sequence of voltage pulses). Digital devices, such as terminals and comput- ers, transmit data as a series of electrical pulses which have discrete jumps rather than gradual changes.

Digital Signaling Rates (DSn): A hierarchical system for transmission rates, where "DS0" is 64K bps (equivalent to ISDN B channel), and DS1 is 1.5 Mbps (equivalent to ISDN PRI).

Digital Transmission: A method of electronic information transmission common between computers and other digital devices. Analog

signals are waveforms: a combination of many possible voltages. A computer's digital signal may be only "high" or "low" at anygiven time. Therefore, digital signals may be "cleaned up" (noise and distortion removed) and amplified during transmission.

Digitize: To convert an analog signal to a digital signal.

DIP switch (pronounced "dip switch"): A set of tiny toggle switches, built into a DIP (dual in-line package), used for setting configurable parameters on a PCB (printed circuit board).

Driver: A software module that interfaces between the Operating System and a specific hardware device (i.e. color monitors, printers, hard disks, etc.). Also known as a device driver.

Drop and Insert: The process where a portion of information carried in a transmission system is demodulated ("Dropped") at an intermediate point and different information is included ("Inserted") for subsequent transmission.

DTE (Data Terminating Equipment): A term used to include any device in a network which generates, stores or displays user information. DTE is a telecommunications term which usually refers to PCs, terminals, printers, etc.

DTMF (Dual-Tone MultiFrequency): A generic push-button concept made popular by AT&T TouchTone.

E

E&M: A telephony trunking system used for either switch-to-switch, or switch-to-network, or computer/telephone system-to-switch connection.

EIA: The Electronics Industries Association is a trade organization in Washington, DC that sets standard for use of its member companies. (See RS-232, RS-422, RS530.)

Encapsulation: A technique used by network-layer protocols in which a layer adds header information to the protocol data unit from the preceding layer. Also used in "enveloping" one protocol inside another for transmission. For example, IP inside IPX.

Errored Seconds (ES): Any second of operation that all 1.544M bits are not received exactly as transmitted. Contrast "Error Free Seconds".

Error Free Seconds (EFS): Any second of operation that all 1.544M bits are received exactly as transmitted. Contrast "Errored Seconds".

ESF Error Event: A T1 error condition that is logged when a CRC-6 error or an OOF error occurs.

Ethernet: A 10-megabit baseband local area network that allows multiple stations to access the transmission medium at will without prior coordination, avoids contention by using carrier sense and deference, and resolves contention by using collision detection and transmission. Ethernet uses carrier sense multiple access with collision detection (CSMA/CD).

Excess Zeros: A T1 error condition that is logged when more than 15 consecutive 0s or less than one 1 bit in 16 bits occurs.

Exchange: A unit (public or private) that can consist of one or more central offices established to serve a specified area. An exchange typically has a single rate of charges (tariffs) that has previously been approved by a regulatory group.

Exchange Area: A geographical area with a single uniform set of charges (tariffs), approved by a regulatory group, for telephone services. Calls between any two points within an exchange area are local calls. See also "Digital PBX", "PBX".

Exchange Termination (ET): The carrier's local exchange switch. Contrast with "Loop Termination - LT".

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Contents User Guide Record of Revisions RevisionDescription User GuideContents Appendices Introduction and Description MultiFRAD 3000-Series IntroductionPreview of this Guide Ethernet Front Panel DescriptionComposite Link Voice/Fax Channels 1 Channels 1Channels 3 through Monitor XMT/RCV Connector Power ConnectorFrame Ground GND Connector Internal Composite Link T1 DSU ConnectorVoice/Fax Channels 1 8 Connectors Channels 3 10 ConnectorsVoice/Fax Channel Connectors Technical SpecificationsCommand Port Channel ConnectorsInstallation Unpacking your MultiFRAD Safety WarningsCabling your MultiFRAD Valid Voice/Fax ChannelsChannel Cable Connections Voice/Fax Cable Connections Default Jumper Block Positioning ProcedureSoftware 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 STP Spanning Tree Port Statistics IPX Port StatisticsWAN Statistics Snmp StatisticsPPP Statistics Data Port Statistics Frame Relay Statistics MultiFRAD 3000-Series User Guide Remote Configuration and Management Modem-Based Remote ConfigurationRemote Configuration and Management LAN-Based Warranty, Service and Tech Support Telnet Remote ManagementMultiFRAD Management Menu MultiFRAD ConfigurationRemote User Database WEB Browser ManagementRemote Configuration and Management MultiFRAD 3000-Series User Guide Warranty, Service and Tech Support On-line Warranty Registration Limited WarrantyContacting Tech Support via E-mail Tech SupportRecording MultiFRAD Information To Download a file ServiceMulti-Tech BBS To log on to the Multi-Tech BBSIf you don’t know the file name About the InternetMultiFRAD 3000-Series User Guide Appendices LAN Cables Appendix a Cabling Diagrams Command Port CableVoice/Fax Channel Connectors RS232C/V.24 * Link Cable Trunk CableCommand Port Remote Configuration CableAppendix 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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