MOCET IP3072 - Manual (Page 76)

Page 76
MOCET IP3072 Smart Office IP Desk Phone User Guide
IP Centrex This service is offered by the LEC to the end user. The feature-
rich Centrex line offers the same features and benefits as a PBX
to a customer without the capital investment or maintenance
charges. The LEC charges a monthly fee to the customer, who
must agree to sign a term agreement. And the abive service is
thru VoIP called IP centrex.
Jitter Jitter refers to fluctuations in transmission delay time. In the case
of voice data, conversations are packaged into packets (IP
packetization) and transmitted. Individual packets can take
different routes through the varied networks that comprise the
Internet. When the time interval for the arrival of the packets is not
constant the timing fluctuations that may occur are referred to as
"jitter".
MAC Medium Access Controller (MAC) : The IEEE 802.11 Standard
encompasses the physical layer (PHY) and the lower portion of
the data link layer. The lower portion of the data link layer is often
referred to as the Medium Access Controller (MAC) sublayer.
Every wireless 802.11 device has its own specific MAC address
hard-coded into it. This unique identifier can be used to provide
security for wireless networks. When a network uses a MAC table,
only the 802.11 radios that have had their MAC addresses added
to that network's MAC table will be able to get onto the network.
NAT Network Address Translation : A network capability that enables a
houseful of computers to dynamically share a single incoming IP
address from a dial-up, cable or xDSL connection. NAT takes the
single incoming IP address and creates new IP address for each
client computer on the network.
Numbering plan In a communications network, a numbering plan allocates specific
numeric codes to identify each subscriber line, special lines, trunk
lines, etc. Numbering plans can be divided into the numbering
system and number assignments. The numbering system
indicates the number of digits to be assigned and the basic
scheme of number assignment. The assignment of specific codes
is performed according to the numbering system.
PBX Private Branch eXchange :An in-house telephone switching
system that interconnects telephone extensions to each other as
well as to the outside telephone network.
Peer-to-peer
network A wireless or wired computer network that has no server or central
hub or router. All the networked PCs are equally able to act as a
network server or client, and each client computer can talk to all
the other wireless computers without having to go through an
access point or hub. However, since there is no central base
station to monitor traffic or provide Internet access, the various
signals can collide with each other, reducing overall performance.
POTS Plain Old Telephone Service (POTS), or Pretty Old Telephone
System is the standard analog traditional telephone service that
most homes use. In contrast, telephone services based on high-
speed, digital communications, such as ISDN and DSL, are not
POTS. The main distinctions between POTS and non-POTS
services are speed and bandwidth.