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This is the main glossary available in all courses.


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M

man-in-the-middle

:
A scenario where a (not necessarily malicious) service intercepts conversations between two parties without them knowing it.

Malicious use of this scheme (man in the middle attack) may be used for example to get access to confidential information (such as credit card data in a man-in-the-middle attack against a web commerce site).

Non-malicious examples is a web proxy or reverse proxy.

wikipedia.ico Man-in-the-middle attack

MAPI

:
Acronym for Messaging Application Programming Interface

An abstract API to facilitate programmatic access mail services on Windows systems. Allows programs to use mail services without knowledge of the installed mail program.

-> wikipedia.ico MAPI

Master PBX

:
The PBX that serves as the root of a PBX tree in a multi-PBX scenario.

Media-Gateway

:
The term media gateway in innovaphone speak refers to a device that interfaces the VoIP system to a legacy trunk line interface (such as ISDN) but is not capable of running a PBX. The IP1060 is a media gateway.
Keyword(s):

Media-Relay

:
Media-Relay is a mechanism where the RTP media stream of a VoIP call (which normally is end-to-end) is routed through an extra-hop (usually some sort of gateway). This is often done to talk to remote parties which do not allow traffic to multiple addresses (such as some SIP trunk line providers).

Keyword(s):

Memory paging

:
Memory paging is a technique where a computer operating system assigns RAM memory to a program than is physically available. When unavailable memory is used, some other memory is saved to a secondary storage (e.g. disks) and re-used then.

Paging does allow for the execution of larger programs but degrades overall system performance.

Metadir

:
Abbreviation of -> MetaDirectory

MetaDirectory

:
Commercially available LDAP directory service

www.png www.estos.com: products/metadirectory

moodle

:
The e-learning environment that you are using which is one of the most widely used systems worldwide. Further information on using moodle for training can be found on the www.png moodle community site.

MOS

:
Acronym for Mean opinion score

In multimedia (audio, voice telephony, or video) especially when codecs are used to compress the bandwidth requirement (for example, of a digitized voice connection from the standard 64 kilobit/second PCM modulation), the mean opinion score (MOS) provides a numerical indication of the perceived quality of received media after compression and/or transmission. The MOS is expressed as a single number in the range 1 to 5, where 1 is lowest perceived audio quality, and 5 is the highest perceived audio quality measurement.

wikipedia.ico Mean opinion score

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