SCHOOL M.I.S.
SOFTWARE >>>
SOFTWARE >>>
Jargon Buster
The du Pré Jargon Buster found the following for - MNos A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
|
Term
|
Explanation
|
|
| M | Mega. A data term meaning 2 to the power of 20 = 1,048,576 | |
| m | Milli. 10 to the power of -3 = One thousandth or .001 | |
| MAC | Media Access Control. The lower sublayer of the data link layer of the OSI model. There are different MAC protocols for the different IEEE 802 LANs | |
| Macro Virus | Macro viruses are small programs written using the internal programming language of a specific application program that replicate within documents created by the application program. Common examples of application programs that use macros include word processors such as Word and spreadsheets such as Excel. | |
| Main Directory Number | A number which is the specific number of an exchange line of channel, and which can have additional ‘auxiliary working’ lines or channels added to it | |
| Maint/Mtcs | A BT term. Maintenance | |
| Malicious Code | Malicious code is any code added, changed, or removed from a software system in order to intentionally cause harm or subvert the intended function of the system. Traditional examples of malicious code include viruses, worms, Trojan Horses, and attack scripts, while more modern examples include Java attack applets and dangerous ActiveX controls. | |
| MAN | Metropolitan Area Network. A generic term for a geographically extended high speed LAN designed to interconnect users within a city or metropolitan area | |
| Manipulation | The insertion of arbitrary streams of data without the user noticing it. | |
| MAPI | Messaging Application Programming Interface is an interface developed by Microsoft that provides messaging functions including addressing, sending, receiving and storing messages. Simple MAPI includes some of these functions. Extended MAPI includes all of these functions. | |
| Master Socket | The first telephone socket to which a Direct Exchange Line is connected. Contains lightning protection and capacitance for bell ringing. Sometimes referred to as the Primary Socket | |
| MAU | i) Media Access Unit. A single wire device that combines the function of a transmitter and receiver. Also called a transceiver ii) Multistation Access Unit |
|
| MB | The incorrect way to show Mb | |
| Mb | Megabyte. 2 to the power of 20 bytes = 1,048,576 bytes | |
| Mbit/s | Megabits per second. One million bits per second | |
| Mbps | see Mbit/s | |
| MCA | Micro Channel Architecture | |
| MCCOI | Multimedia Communications Community of Interest. Established between European Telecommunications operators in order to give manufacturers of PC videophone equipment a framework within which to work | |
| MCNE | Master Certified Novell Engineer | |
| MCP | Microsoft Certified Professional | |
| MCSE | Microsoft Certified Systems Engineer | |
| MDF | Multiple Distribution Frame. Similar to TJF | |
| Medium | Any material substance that can be used for the passing of signals from one point to another, such as optic fibre, cable, wire, air or free space | |
| Meg | The abbreviation of Mega | |
| Mega | One million, exactly | |
| Megabyte | 1,048,576 bytes. Basic unit of measurement of mass storage. Also used in describing data transfer rates as a function of time – Megabytes per second | |
| Megahertz | The unit used to measure the clock speed of a computer. The higher the measurement, the faster the computer will operate. One million hertz | |
| MegaStream | A digital circuit rented from a PTO, offering 2.048Mbit/s | |
| Mercury | The first PTO competitor to BT, following de-regulation in 1983. Formed by Cable & Wireless, Barclays Bank, and BP | |
| Message Waiting | A telephony term. Where a light shows on a telephone to indicate a message is waiting. If a POT has this facility, it is called a ‘Message Waiting POT’. Some Message Waiting POTs require 3-wires to connect to the CCU rather than the usual 2 | |
| MessageLink | A BT term. Associted with BT's Advanced Features. Caller has increased chance of being answered and more informed. Caller receives added value content message if the call is not completed (Option 1). Caller can leave a message (Option 2). Caller is deterred from trying a competitor. | |
| Meter Pulse | A 100msec burst of 50Hz transmitted on PSTN lines, only. See Meter Pulsing | |
| Meter Pulse Detection | The ability for equipment to detect a Meter Pulse | |
| Meter Pulsing | A BT service for their PSTN lines, only, from which a subscriber could accurate establish the charge of a telephone call. To a subscriber, it was a Meter Pulse received down their telephone line. To BT, it was a Charge Unit recorded on the subscriber's meter in the local BT exchange. During a call, the first pulse would be transmitted the moment the call connected. Subsequent pulses would be transmitted at time intervals thereafter, the interval depending upon the telephone number dialled and the time of day. Hence, the more expensive the call, the shorter the time interval (and therefore the more Meter Pulses), and vice-versa. Given a Meter Pulse had a fixed fee associated with it and signalled the start of a time interval, the subscriber was always paying in advance for the call. This had the effect overcharging since it was unlikely the call would be terminated precisely at the end of a time interval. With the advent of computer exchanges, more accurate charging was brought in which costed calls by the second, signalling the demise of the Meter Pulse. Given this 'by the second charging', no new supply or additional supply of Meter Pulsing has been provided since the end of December 1998, and it was totally withdrawn at the end of 2001. This caused difficulties for organisations which relied on charging clients for telephone calls, such as Hotels and Serviced offices. In its place, algorithmic call logging had to be used. Although reasonably accurate, it is not an absolute statement of the cost of a call. For example, it has to guess when the call connects. In addition, given the multitude of different discount rates and charges offered by most PTOs, it is an impossibility to keep such a system up to date. Hence, at best, algorithmic systems are a 'best guess' or an indication of a call cost, rather than an absolute. Soon, however, BT will introduce AOC for its ISDN lines, an accurate Meter Pulse equivalent for its ISDN lines. |
|
| MF | i) A telephony term – see DTMF ii) A radio transmission term. Medium Frequency. 300 kHz – 3 MHz |
|
| MHz | Mega Hertz. 1000 kHz | |
| Micro | 10 to the power of -6. One millionth | |
| Milli | 10 to the power of -3. One thousandth | |
| MIME | Multipurpose Internet Mail Extensions. A protocol used for transmitting documents with different formats via the Internet. | |
| Mod Tap | A manufacturer. One of Mod Tap’s products are LJU adaptors which convert the BT plug on the end of a line cord to an RJ45 plug for use with a Structured Cabling system | |
| MODEM | A contraction of the term Modulator – Demodulator. A modem converts serial digital data from a transmitting terminal into a form suitable for transmission over an analogue line. A second modem re-converts this signal to serial digital data for acceptance by the receiving terminal | |
| Mole | One mole of molecules of any substance has a mass equal to the relative molecular mass in grammes. For example, the relative molecular mass of water is 18, and the mass of one mole of water molecules is 18 grammes. Also, one mole of a substance always contains the same number of particles. For example, a mole of magnesium atoms contains 600,000,000,000,000,000,000,000 atoms. This is also written as 6 x 10 to the power of 23 atoms, and this number is also called Avogadro's constant | |
| Monitor | see VDU | |
| Monitoring | A view of individual user activity on a network, generally in real time. Provides administrators with the ability to view the content of user utilized applications. | |
| MOU | Memorandum of Understanding. A document agreed between two or more parties, detailing conditions or intentions that have to be met | |
| MPD | see Meter Pulse Detection | |
| MPLS | Multiprotocol Label Switching. A base technology for using label switching in conjunction with network layer routing and for the implementation of that technology over various link level technologies, which may include Packet-over-Sonet, Frame Relay, ATM, and Ethernet. | |
| MS-DOS | Microsoft's version of DOS | |
| msec | Milli-second. One thousandth of a second | |
| MSN | A facility where additional telephone numbers can be assigned to a specific ISDN circuit for use by callers to target specific pieces of terminal equipment. If a piece of terminal equipment has been programmed with its specific MSN, and its MSN is dialled, it alone will ring or answer Hence, MSN would be used with an ISDN So-bus. Therefore, MSN cannot be used with an NT2. Note that a maximum of 8 terminal equipments may be connected to an ISDN circuit These MSN numbers can be contiguous or non-contiguous, and are useful when migrating from PSTN to ISDN yet wanting to keep the PSTN numbers - ‘number retention’. Note, though, that this is still subject to survey In very rare cases, a telephone system may be able to recognise MSN instead of DDI for targeting extensions. However, it will always be limited to using two channels for this |
|
| Multicast | A BT term. Normally performed by routers, but also carried out by BT on the SMDS network, Multicast is where a packet stream is transmitted to many destinations | |
| Multiplexing | The function of transporting more than one stream of data over a single circuit (real or virtual) apparently simultaneously. Multiplexing can either be Frequency (FDM) or Time Domain (TDM) |