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MOCET IP3022 SOHO IP Deskphone User Guide
Customer
Premise
Equipment
The only part of the telecommunications system that the customer
comes into direct contact with. Example of such pieces of equipment
are: telephones, key systems, PBXs, voicemail systems and call
accounting systems as well as wiring telephone jacks. The standard
for this equipment is set by the FCC, and the equipment is supplied by
an interconnect company.
DHCP
A utility that enables a server to dynamically assign IP addresses from
a predefined list and limit their time of use so that they can be
reassigned. Without DHCP, an IT Manager would have to manually
enter in all the IP addresses of all the computers on the network.
When DHCP is used, whenever a computer logs onto the network, it
automatically gets an IP address assigned to it.
DID
Direct Inward Dialing: The ability to make a telephone call directly into
an internal extension without having to go through the operator.
Diff-Serv
Differentiated Services : The Diff-Serv model divides traffic into a
small number of classes to provide quality of service (QoS). One of
QoS in internet
Direct inward
dialing
A Centrex feature that allows an outside caller to dial a central
business number, as well as an extension number.
Diversity antenna A type of antenna system that uses two antennas to maximize
reception and transmission quality and reduce interference.
DNS
Domain Name Service : A server/program that translates URLs to IP
addresses by accessing a database maintained on a collection of
Internet servers. The program works behind the scenes to facilitate
surfing the Web with alpha versus numeric addresses. A DNS server
converts a name like mywebsite.com to a series of numbers like
107.22.55.26. Every website has its own specific IP address on the
Internet. Typically one or more DNS servers is located in an IP
network.
DSL
Various technology protocols for high-speed data, voice and video
transmission over ordinary twisted-pair copper POTS (Plain Old
Telephone Service) telephone wires.
DSP
Digital Signal Processors (DSP) standardize the different states of a
digital signal into an organized and understandable signal. DSP
circuits can differentiate between digital signals and digital noise.
Signal-to-Noise ratio is one of the most important factors in telephony
voice communication because if there is too much noise in a signal,
the DSP will be unable to find a signal standard and lose it. DSP
circuits always adjust digital signal levels so the can maintain a
standard without noise.
DTMF
Dual Tone Multi-Frequency: The type of audio signals generated
when you press the buttons on a touch-tone telephone. Can be used
in inbound(after voice channel connected) and outbound(before
voice channel connected) application.
Ethernet
International standard networking technology for wired
implementations. Basic 10BaseT networks offer a bandwidth of
about 10 Mbps. Fast Ethernet (100 Mbps) and Gigabit Ethernet
(1000 Mbps) are becoming popular.
G.711
64 kbps PCM half-duplex codec (high quality, high bandwidth,
minimum processor load)
