| |
|
M |
| MAC |
 |
Media Access Control, a method of controlling access
to a transmission medium. For example, token ring,
Ethernet, FDDI, etc. |
| MACU |
|
Mini-RAM Alarm and Control Unit |
| MAN |
|
Metropolitan
Area Network, a communication network covering the
geographic area of a city (generally,
larger than a LAN but smaller than a WAN). FDDI can
provide a private MAN, while IEEE 802.6 can provide
a public MAN. |
| MAU |
|
Multistation Access Unit, a hub in a token ring network;
each MAU supports up to eight nodes and servers and
can be connected to other units to create large networks.
Also Medium Attachment Unit (IEEE 802.3). |
| MBPA |
|
Mini-RAM BackPlane Assembly |
| Mbps |
|
Megabits per second |
| MCA |
|
Micro Channel Architecture, the basis for the IBM Micro
Channel bus used in high-end models of IBM's PS/2 series
of personal computers. |
| MCP |
|
Multi-Chip
Package |
| MCU |
|
Maintenance Control Unit |
| MDF |
|
Main
Distribution Frame |
| MDU |
|
Multi-Dwelling Units, apartment buildings and condominiums |
| MGC |
|
Media
Gateway Controller |
| MGCP |
|
Media
Gateway Control Protocol |
| MHS |
|
Message
Handing Service |
| MIB |
|
Management Information Base, a collection of objects
that can be accessed via a network management protocol;
a database of network parameters used by SNMP and CMIP
(Common Management Information Protocol) to monitor
and change network device settings. It provides a logical
naming of all information resources on the network
that are pertinent to the network's management. |
| MILNET |
|
Protocol
that uses distributed shortest path algorithm to control
how core gateways (or routers) should exchange
access and routing information. |
| MJ |
|
Modular Jack, a jack used for connecting voice cables
to a faceplate, as afor a telephone. |
| MMJ |
|
Modified Modular Jack, these are the 6-pin connectors
used to connect serieal terminal lines to terminal
devices. MMJs can be distinguished from the similar
RJ12 jacks by having a side-locking tab, rather than
a center-mounted one. |
| |
|
|
| MMS |
|
Manufacturing
Message Service MMF Multi Mode optical Fiber. |
| Modem |
|
A modulator-demodulator device for changing transmission
signals from digital to analog for transmission over
phone lines. Used in pairs, one is required at each end
of the line. |
| Modulation |
|
Process by which signal characteristics are transformed
to represent information. Types of modulation
include frequency modulation (FM), where signals of different
frequencies represent different data values. |
| MOP |
|
Maintenance Operations Protocol, a DEC protocol used
for remote communications between hosts and servers. |
| MSNF |
|
Multiple SNA Network Facility |
| MTU |
|
Maximum
Transmission Unit, the largest possible unit of data
that can be sent on a given physical medium.
For example, the MTU of Ethernet is 1,500 bytes.
Multi-Tenant
Units, office-buildings. |
| Multicast |
|
A special form of broadcast where copies of the packet
are delivered only to a subset of all possible destinations;
a message that is sent out to multiple devices on the
network by a host. |
| Multiplexer |
|
A device that allows several users to share a single
circuit. It funnels different data streams into a single
stream. At the other end of the communications link,
another multiplexer reverses the process by splitting
the data stream back into the original stream. |
| Multiplexing |
|
A technique that enables several data streams to be
sent over a single physical link; also, (ISO) a function
by which one connection from a layer is used to support
more than one connection to the next higher layer. |
| MUX |
|
Multiplexer A telecommunications device that funnels
multiple signals onto a single channel. |
| Multiport
repeater |
|
A
repeater, either standalone or connected to standard
Ethernet cable, for interconnecting up
to eight Thinwire Ethernet segments |
| |
|
|
