><><><><><><><><><><><><><><><><><><><><><><><><><><><><> ********************************************************* * * * Database of Network Terminology * * Part 10 * * * * * * Another Modernz Presentation * * * * by * * Digital-demon * * * * (C)opyright March 13, 1992 * * * ********************************************************* <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> ******************************************************************************* The Modernz can be contacted at: MATRIX BBS WOK-NOW! World of Kaos NOW! World of Knowledge NOW! St. Dismis Institute - Sysops: Wintermute Digital-demon (908) 905-6691 (908) WOK-NOW! (908) 458-xxxx 1200/2400/4800/9600 14400/19200/38400 Home of Modernz Text Philez <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>< <*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*> <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> TANSTAAFL The Church of Rodney - Sysop: Tal Meta (908) 830-TANJ (908) 830-8265 Home of TANJ Text Philez <*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*> Syndicate Bbs Sysop: Hegz (908)506-6651 300/1200/2400/4800/9600 14400/19200/38400 Modernz Site TLS HQ <><><><><><><><><><><><><><<><<><><><><><><><><><><><><><><><><><><><><><><><>< The Global Intelligence Center World UASI Headquarters! Pennsylvania SANsite! (412) 475-4969 300/1200/2400/9600 24 Hours! SysOp: The Road Warrior <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>< The Last Outpost PowerBBS Support Board UASI ALPHA Division NorthWestern PA UASI site! (412) 662-0769 300/1200/2400 24 hours! SysOp: The Almighty Kilroy <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>< Hellfire BBS SANctuary World Headquarters! New Jersey UASI site! (908) 495-3926 300/1200/2400 24 hours! SysOp: Red <*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*> BlitzKreig BBS Home of TAP (502)499-8933 <*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*> M-bit ===== More data bit. X.25 packet level. MAC === Memory Access Controller. A board in an Engine; allocates, partitions, and protects data in memory. Also the MAC maps virtual memory addresses to absolute memory addresses. MAC II ====== Memory Access Controller II. A memory operations board used in the Engine and Mini-Engine. The MAC II provides addresses for all memory-access operations, controls data transfer signals, and provides the data for a write-or-read memory cycle. The MAC II is connected to the ROM and I/O board. MAC III ======= Memory Access Controller III. The MAC III is a combination of the MAC, MAC II, and the memory boards. machine language ================ A language used directly by a computer. Machine-Readable Detail (MRD) ============================= A computer-generated invoice that has been manually modified. macro ===== A statement in code that is expanded into one or more identifiers or statements and can consist also of one or more parameters. When invoked, a macro causes a list of conditions to occur. macro call ========== A statement that invokes a macro. magnetic disk ============= A metal platter coated with a magnetically active substance to allow information to be stored on it. MAIL ==== The Dialcom Electronic mail service. A computer-based messaging service that allows BT North America customers to create, read, distribute, and file mail messages electronically. MAIL.REF File ============= A Dialcom file that contains distribution lists of alternate reference names (nicknames) for mail and Telex recipients. mailbox interrupt ================= On the Turbo Engine logic boards (FS, GP, IOC-II x) the mailbox interrupt is a means of interboard communication. This facility notifies Turbo-SCP when an IPCF message is waiting to be processed. mainframe ========= A large, multiuser computer. mark ==== The presence of a signal. In telegraphy, mark represents the closed condition or current flowing. Equivalent to a binary 1 condition. See also parity. Contrast with space. mask ==== Specifies bit fields for consideration during a search. master ====== Any system, terminal, board, or program that has a slave system to carry out its functions. Also, a functional module that initiates Data Transfer Bus (DTB) cycles to transfer data between itself and a slave module. This method of transfer is used on the Turbo Engine VMEbus. Contrast with slave. Master User Directory (MUD) =========================== The access control database stored on the disk of each network Supervisor. One controlling feature for a user gaining access to the TYMNET network. match string ============ A string of characters that causes the automatic login process to pause and wait for a prompt from the network host and/or application confirming acceptance. For example, Menu Service allows a user to speci y this string. The Menu Server is the means by which this process is performed. MB == Megabyte: 1,048,576 bytes. Mb == Megabit. MB line ======= Measured Business line. Mbps ==== Megabits per second. MCP === Mutual Conversion Program. A program that translates one character set to another. Specifically, a BT North America product that translates the standard set of Katakana characters. Also, acronym for Master Control Program. MDR === Multiple Data Record. An analysis program used to develop guidelines for data transmission between a TYMNET interface and a TYMNET network. These guidelines establish the speed and capacity of the outgoing link from an interface to the next node in the network. See TYMNET On-line Planning System. Mean Time Between Failures (MTBF) ================================= The period of time during which users can reasonably expect a device to operate without a failure. Mean Time To Repair (MTTR) ========================== The average time required to perform corrective maintenance excluding the technician's travel time. mega ==== In the metric system, a prefix meaning million (1,000,000). See byte. megabyte (MB) ============= 1,048,576 bytes. Memory Access Controller (MAC) ============================== A board in an Engine that allocates, partitions, and protects data in memory. Also, the MAC maps virtual memory addresses to absolute memory addresses. Memory Access Controller-II (MAC II) board ========================================== A memory operations board used in the Engine and Mini-Engine. The MAC II provides addresses for all memory-access operations, controls data transfer signals, and provides the data for a write-or-read memory cycle. The MAC II is connected to the ROM and I/O board. Memory Access Controller-III (MAC III) board ============================================ The MAC III is a combination of the MAC, MAC II, and the memory boards. Memory Management Unit (MMU) ============================ A basic element of a Motorola MC68000 family micro-processor chip. The MMU provides address translation and protection for the 16-MB addressing range of the MC68010 used on the IOC-II x boards. memory map ========== A list of addresses that define the boundaries of the object code that occupies Engine memory. Memory Shuffler (MS) ==================== Actual memory transfer process performed by the OCL or the SIO boards. Menu Server =========== The means by which the Menu Service is accomplished. See also Network Services Manager. Menu Service ============ A BT North America automated network and host login service with menus, submenus, and help screens, which provides quick and direct access to the host destination. This service eliminates the necessity to manually log into the target host through a gateway and a host interface. MERLIN ====== Merge and Link ISIS Nodes. A network utility program that binds a combination of Node Code, the ISIS Kernel, and one or more slot codes into a binary image file to be loaded into an Engine. Message Object (MO) =================== An X.409 element within a LOG-II message. Each MO is unique; it has the same meaning in any LOG-II message. message switching ================= A method of handling messages over communications networks. The entire message is transmitted to an intermediate point (a switching computer) , stored for a period of time, and then transmitted. Two examples are Telex and fax. Also called datagram. micro ===== In the metric system, a prefix meaning one millionth (1/1,000,000). Micro-Engine ============ Low-end version of the Engine family. A fully integrated system, packaged in a desktop enclosure consisting of three boards (processor board, memory board, and I/O board). Microchannel ============ An IBM personal computer platform. microcode ========= A list of program steps stored in ROM that controls the operation of a computer. Microcom Network protocol (MNP) =============================== A part of CCITT Recommendation V.42, which provides standardized error-checking protocol for dial-up modems. The BT North America 2400 bps service uses MNP. microcomputer ============= The smallest type of computer, consisting of a micro-processor and associated storage and I/O elements. microprocessor ============== One or more ICs that contain the CPU (the basic arithmetic logic and storage elements) required for processing. milli ===== In the metric system, a prefix meaning one thousandth (1/1,000). Mini-Engine =========== Hardware similar to the Engine, but mounted in a smaller cabinet, with an 8-slot chassis. Supports applications requiring a moderate number of connections. Provides synchronous and asynchronous interface communications between dissimilar devices. Mini-Engine XL ============== The Mini-Engine XL uses the new CPU III and MAC III boards, and 5-slot Direct Memory Access (DMA) backplane, enabling it to perform two to three times faster than the standard Mini-Engine, depending on application. The XL is housed in the same size cabinet as the Mini-Engine. minicomputer ============ A relatively fast but small and inexpensive computer with somewhat limited I/O capabilities. Missing ======= State of host or link. MLI === Multileaving Interface. MMU === Memory Management unit. A basic element of a Motorola MC6800 family microprocessor chip. The MMU provides address translation and protection for the 16-MB addressing range of the MC68010 used on the IOC-II x boards. MNC === Multi-Node Code. Two or more Node Code slots running in a Turbo Engine system chassis. See Node Code. MNP === Microcom Network Protocol. A part of CCITT Recommendation V.42, which provides standardized error-checking protocol for dial-up modems. The BT North America 2400 bps service uses MNP. MO == Message Object. An X.409 element within a LOG-II message. Each MO is unique; it has the same meaning in any LOG-II message. MOD === Modulo. Mathematical function that yields the remainder of a division operation, for example, 3 mod 2 = 1. Also, in X.25, throughput window size. modem ===== Modulator/Demodulator. An electronic device that allows computers to communicate over standard analog telephone lines. It converts analog signals to digital signals and vice versa and connects data terminal equipment to a communications line. modular ======= A program or unit of hardware that is discrete and identifiable and designed for use with other programs or hardware components. modulation ========== Alteration in the characteristic of a carrier signal by impressing an information signal on the carrier. modulo (MOD) ============ Mathematical function that yields the remainder of a division operation for example, 3 mod 2 = 1. Also, in X.25, throughput window size. MOS === Metal Oxide Semiconductor. Also, Multiple Operating System. Mother board ============ Serial Input/Output (SIO) Controller board. A board in the Engine, Mini-Engine, and Compact XL that controls highspeed synchronous and asynchronous communication lines. It is a Direct Memory Access (DMA) interface. This board can access the first 1024 KB of memory and can issue interrupts. In the old-style connection, the SIO Controller board was connected up to 8 SIO interface boards over a ribbon bus cable with 8 connector-ends. In the new style, the SIO Controller board is connected to up to 8 SIO interface boards through the backplane of a PSM bucket. MP == Multiple Extended Processor. A system that moves the Dispatcher capabilities from the Engine ISIS Kernel to the Extended Processor Interface (XPI) board, a Direct Memory Access (DMA) device. MPVC ==== Multiplexed Permanent Virtual Circuit. A virtual circuit that permits a group of users and multiple sessions access to a circuit. MRD === Machine-Readable Detail. A computer-generated invoice that has been manually modified. MS == Memory Shuffler. Actual memory transfer process performed by the OCL or the SIO boards. ms == Millisecond. MSI === Medium Scale Integration. MTBF ==== Mean Time Between Failures. The period of time during which users can reasonably expect a device to operate without a failure. MTTR ==== Mean Time To Repair. The average time required to perform corrective maintenance, excluding the technician's travel time. MUD === Master User Directory. The access control database stored on the disk of each network Supervisor. One controlling feature for a user gaining access to the TYMNET network. Multi-Node Code (MNC) ===================== Two or more Node Code slots running in a Turbo Engine system chassis. See Node Code. multidrop ========= A configuration in which one front-end processor (FEP) communicates to several cluster controllers over a connection to one of the cluster controllers. The cluster controller configuration is similar to a daisy chain. Also called multipoint. Multifunction board =================== A PCB used in the Engine and Mini-Engine. It is not connected to any other board by cables. Its functions include a temperature sensor, ac voltage sensor, a power fail detector, and terminal interface. This board also contains the Watchdog timer for the system. Multiple Data Record (MDR) ========================== An analysis program used to develop guidelines for data transmission between a TYMNET interface and a TYMNET network. These guidelines establish the speed and capacity of the outgoing link from an interface to the next node in the network. See TYMNET On-line Planning System. Multiple Extended Processor (MP) ================================ A system that moves the Dispatcher capabilities from the Engine ISIS Kernel to the Extended Processor Interface (XPI) board, a Direct Memory Access (DMA) device. multiplex ========= To subdivide a transmission channel into two or more separate channels of slower speeds. A means of interleaving or concurrently transmitting more than one message on a single channel. multiplexed packet switching ============================ A network in which each node assembles/disassembles a packet containing data from different users. Data within the packet can have a different source and destination than other data in the packet. The one commonality is that the virtual circuits (logical pathways from source to destination) all include the same internode link. TYMNET is a multiplexed packet-switching network. Multiplexed Permanent Virtual Circuit (MPVC) ============================================ A virtual circuit that permits a group of users and multiple sessions access to a circuit. multipoint ========== A configuration in which one front-end processor (FEP) communicates to several cluster controllers over a connection to one of the cluster controllers. The cluster controller configuration is similiar to a daisy chain. Also called multidrop. multitargeting ============== A list of destination targets (requested by users simultaneously) from which the Supervisor selects one to complete the circuit request. Mutual Conversion Program (MCP) =============================== A program that translates one character set to another. Specifically, a BT North America product that translates the standard set of Katakana characters. MUX === Circuit Multiplexer. An ISIS slot program that allows users to build and maintain multiple circuits to other tools and applications on their hosts. A MUX also allows its users to communicate with other users with a Talk mode facility. The MUX is accessed over a Boss circuit as a host in an ISIS slot. MVC === Master Virtual Circuit. |-|-|-|-|-|-|=|=|=|=|=|=|=|=|=|=|=|-|-|-|-|-|-|-|-|-|-|-|=|=|=|=|=|=| Disclaimer ~~~~~~~~~~ This publication is for informational purposes ONLY. In no way are the above authors, or organizations, liable for the use or misuse of the information contained herein. The Underground Agent Society Inc., The Agents Underground Notebooks, UASI, UASI Magazine, The Global Intelligence Center, and The Global Intelligence Underground are all unregistered trademarks of UASI. Distribution to EVERYWHERE is ENCOURAGED! Hellfire BBS, SANctuary Magazine, SANphilez, and SANsites are all unregistered trademarks of SANctuary. Matrix BBS, Modernz, and others are unregistered trademarks of Modernz. Distribution of these text files is allowed...and downright encouraged. |-|=|-|=|-|=|-|=|-|=|-|=|-|=|-|=|-|=|-|=|-|=|-|=|-|=|-|=|-|=|-|=|-|=|-|=|-|=|-| <*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*> <*> <*> <*> THIS HAS BEEN A MODERNZ PRESENTATION <*> <*> <*> <*> SEE YOU ALL AT MATRIX BBS (908)905-6691 <*> <*> <*> <*> NON-PURSUITABLE WITHOUT A GLOBAL <*> <*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*><*>