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200 9-2010
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Short for Dynamic Host Configuration Protocol, a protocol for assigning dynamic IP addresses to devices
on a network. With dynamic addressing, a device can have a different IP address every time it connects
to the network. DHCP also supports a mix of static and dynamic IP addresses.
DID
Direct Inward Dial. A specially configured phone line from the telephone company that allows for dialing
inside a company directly without having to go through an attendant. A DID line cannot be used for
outdial operation since there is no dial tone offered. However, it can be configured so an outside caller
can reach an inside extension with a 7-digit number through the phone company's central office.
DNS
The Domain Name System is the system that translates Internet domain names into IP numbers. A "DNS
Server" is a server that performs this kind of translation.
FXO
In telecommunications, a Foreign Exchange Office, or FXO, is a telephone signaling interface that
receives POTS, or "plain old telephone service".
FXS
Foreign Exchange Station is the interface on a VoIP device for connecting directly to phones, faxes, and
CO ports on PBXs or key telephone systems.
GATEWAY
A network point that acts as an entrance to another network.
IP ADDRESS
Every machine that is on a network (a local network, or the network of the Internet) has a unique IP
number [four sets of numbers divided by period with up to three numbers in each set. (i.e.
192.168.0.100)] - If a machine does not have an IP address it cannot be on a network.
IVR
Interactive Voice Response: A system to automatically manage incoming calls, IVR can link phone callers
(voice and/or touchtone) with a computer database. It can accept a question, access the company's
database and provide a caller with the information they are seeking. It can also take information from
the caller, convert it to data and input that data to the database.
LAN
Local Area Network: A LAN is a group of computers and associated devices that share a common
communications line or wireless link and typically share the resources of a single processor or server
within a small geographic area (for example, within an office building).
NETMASK
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