Snom ONE IP, Техническое руководство

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snom ONE • Administrator Guide, Release 5
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packets are played out as they arrive, the output will produce jitter and will be of
poor quality. Jitter buffers can be used to change the variable delays into constant
delays.
LAN (Local Area Network)
A computer network covering a small physical area, like a home, office, or small
group of buildings, such as a school, or an office park. LANs are connected pri-
marily through Ethernet and can be connected to other LANs over any distance
via telephone lines and radio waves. LANs have a high data transfer rate and are
not very expensive to set up. See also “WAN.”
MAC (Media Access Control) address
A hardware address that uniquely identifies most network adapters or network
interface cards (NICs) by the manufacturer for identification. The manufac-
turer’s registered identification number is usually part of the MAC address if it
was assigned by the manufacturer. The MAC address is used by the Media Access
Control protocol sub-layer of the Data-Link Layer (DLC) of telecommunication
protocols.
MIPS (million instructions per second)
An old method for measuring a computer’s speed and power and, by implication,
for determining the amount of work a computer can do. It measures the ap-
proximate number of machine instructions the computer can execute in 1 second
(i.e., it measures CPU speed). Because there are so many variables with computer
performance (e.g., varying amounts of time for different instructions, importance
of I/O speed, etc.), MIPS ratings are not used that often anymore. However, a
MIPS rating can give you a general idea of a computer’s speed.
MoH (Music on Hold)
Recorded music that is used to fill the silence that would be heard by telephone
callers who have been placed on hold.
MOS (mean opinion score)
A measurement that is used to evaluate the quality of human speech at the point
of termination on any type of phone connection (audio, voice telephony, or
video). A group of listeners simultaneously hear a reader recite a series of test sen-
tences, presented by a male voice, then repeated using a female voice (computer-