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MAC
Media Access Control
MAN
Metropolitan Area Network
MAU
Media Attachment Unit 802.3 or Multiple Access Unit IBM ¨ 802.5
In a 802.3, a device that performs IEEE 802.3 layer 1 functions, including collision detection and injection of bits onto the network. A MAU is referred to as a transceiver in the Ethernet specification. IEEE 802.5 MAU - sometimes called MSAUs so as not to confuse them with IEEE 802.3 MAUS - are wiring concentrators to which Token-Ring lobes attach. A MAU is a 8228 Multistation Access Unit. This unit provides eight workstation connectors and 2 MAU ports - also called Ring In/Ring Out ports.
MB
Mega Bytes - 1,048,576 bytes
Mb
Mega Bit
Mbps
Mega Bits Per Second
MCM
Multi Media Conference Manager - Cisco
MCR
Minimum Cell Rate
MCTD
Mean Cell Transfer Delay
MCS
Media Convergent Server - Cisco
MCU
Multipoint Control Unit
MEGA BITS - M/Bits
See byte
MEGA BYTES
See byte
MGCP
Media Gateway Control Protocol - Cisco
MIB
Management Information Base
A database of information on managed objects that can be accessed via network management protocols such as SNMP and CMIP.
MIPS
Millions of Instructions Per Second
MIS
Management Information Services
MLBA
Multi Node Load Balancing Architecture
MLID
Multiple Link Interface Driver
MLP
Multi Link Procedure
MM
Multi-mode Optical Fiber
MMJ
Modified Modular Jack
MNCA
Maximum Normalized Cable Attenuation
MNLB
Multi Node Load Balancing
MNP
Microcom ¨ Networking Protocol
Protocols created by Microcom used to compress and correct the errors.
See Modem
Two connected modems should use the same MNP protocol.
| MNP1 to 4 |
|
| MNP 5 |
Includes MNP 1 to 4 Uses an algorithm which compresses the data transferred up to 200 percent |
MODEM
Modulator / Demodulator - See also " Hayes " for all the command codes
| UIT Standard |
Speed/Baud |
Comment
|
Date |
| V.21 |
300 |
|
Nov.96 |
| V.22 |
1200 |
1200 Baud. Synchronous or asynchronous data transfer. 2 wires. Full duplex. |
Nov.98 |
| V.22 Bis |
2400 |
2400 Baud. Synchronous or asynchronous data transfer. 2 wires. Full duplex. |
Nov.98 |
| V.25 |
- |
Automatic answer. Parallel interface. |
- |
| V.25 Bis |
- |
Automatic answer. Serial Interface. |
- |
| V.32 |
9600 |
9600 9.6 Kbits/s. Synchronous or asynchronous data transfer. 2 wires. Full duplex. |
Mar.93 |
| V.32 Bis |
14 400 |
14.4 Kbits/s. Synchronous or asynchronous data transfer. 2 wires. Full duplex. |
Feb.91 |
| V.33 |
- |
Synchronous data transfer on leased lines. 4 wires. Full duplex. |
- |
| V.34 |
28 800 |
8,8 Kbits/s. Synchronous or asynchronous data transfer. Full duplex. |
Feb.98 |
| V.34+ |
33 600 |
33,6 Kbits/s. Synchronous or asynchronous data transfer. 2 wires. Full duplex. |
- |
| V.42 |
- |
CCITT, today ITU-T recommendation for the errors connections. It includes 2 algorithms - LAPM Link Access Protocol or MNP 1 to 4. LAPM is used to detect errors and re-transmit the bad data blocks. When two modems get connected, if only one is supporting V.42, then MNP will be used. |
- |
| V.42 Bis |
- |
Same than MNP5, but the compression rate could be up to 400 % depending of the type of file which is transmitted. |
- |
| V.90 |
56 000 |
56 Kbits/s. Receive 33,6 Kbits/s / transmit 56 Kbits/s. X2 and K56flex are proprietary solutions. V.90 is compatible with X2 and K56flex. The connection to the IPS is limited to 33.6 Kbit/s |
Sep.98 |
| V.92 |
56 000 |
The connection to the ISP coup be up to 48 Kbit/s. The telephone can be used at the same time than a modem connection. The time to get connected to the IPS will be much faster. |
July 2000 |
| X2 |
- |
A 3Com¨ proprietary implementation of the 56 Kb/s ITU V.90 standard. |
- |
MOSPF
Multicast Open Shortest Path First
MOTIS
Message-Oriented Text Interchange System - ISO
MPDS
Mobile Packet Data Service - Inmarsat¨ - 64 KB - IP satellite transmission.
MPLS
Multi Protocol Label/Layer Switching
MPOA
Multiprotocol Over ATM
MPPP
Multilink Point-to-Point Protocol -
128 K-bit/s via 2 channels B - ISDN connection.
MPR
Multi Protocol Router
MRCS
Multi Rate Circuit Switching
MRU
Maximum Receive Unit
msec
Milliseconds - 10 ** -3 sec.
MSN
Monitoring Cell Sequence Number
MSVC
Meta Signaling Virtual Channel
MTBF
Mean Time Between Failures
MTU
Maximum Transmission Unit -
The max. pkt size, in bytes, that a particular interface will handle.
Multilink PPP
Multilink Point-to-Point Protocol.
This protocol is a method of splitting, recombining, and sequencing datagrams across multiple logical data links.
Multipoint-unicast
A process of transferring protocol data units - PDU - where an endpoint sends more than one copy of a media stream to different endpoints.
MUX
Multiplex or Multiplexer
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