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QXFXO4/QXISDN4/QXE1T1/QXFXS24; (SW Version 6.0.x)
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QXFXO4/QXISDN4/QXE1T1/QXFXS24 Manual II: Administrator’s Guide
Downstream -
in communications, there are two circuits. One coming toward you and the other going away from you. Downstream is another term for
the transmission coming toward you.
Dual-Tone Multifrequency (DTMF) -
a method of signaling consisting of a push-button or touch tone dial that sends out a sound consisting of two
discrete tones that are picked up and interpreted by telephone switches (either PBXs or central offices).
Dynamic Host Configuration Protocol (DHCP)
- a network standard regulating the IP address and other information assigned to the clients by the
server.
Dynamic Host Control Protocol (DHCP)
- a protocol that is used to dynamically allocate and assign IP addresses. DHCP allows you to move network
devices from one subnet to another without administrative attention.
E
E1
- wide area network digital transmission scheme. E1 is the European equivalent of a T1 line. The E1's higher clock rate (2.048 MHz) allows for 32
separate 64Kbps channels, which include one channel for framing and one channel for D-channel information.
Ethernet -
a localarea network used for connecting computers, printers, workstations, terminals, servers, etc., within the same building or campus.
Ethernet operates over twisted pair and/or over coaxial cable at speed up to 10Mbps.
Ethernet Controller
- the unit that connects a device to the Ethernet cable.
Ethernet Switch -
the device that connects local area networks.
Extensions
- users over QX.
External User
- users connecting QX by IP or PSTN calls.
F
Firewall
- a combination of hardware and software that limits the exposure of a computer or group of computers to an attack from outside. A firewall is a
system or combination of systems that enforce a boundary between two or more networks. One purpose of an Internet firewall is to provide a single point
of entry where a defense can be implemented, allowing access to the Internet resources from within the organization, and providing controlled access
from the internet to hosts inside the organization’s internal networks.
Firmware -
is computer or OS required software that resides on ROM
Foreign Exchange (FX) -
a Central Office trunk that has access to a distant Central Office. A dial tone is returned from that distant Central Office and a
location can be reached in the area of the foreign Central Office by dialing a local number.
Foreign Exchange Office (FXO)
- a service that can be ordered from the telephone company that provides local telephone service from a central office
that is outside (foreign to) the subscriber’s exchange area. To generate a call from the computer telephony system to the POTS set, you will need a FXS
connection configured. See also FXS.
Foreign Exchange Station (FXS)
- Interface that connects directly to a standard telephone, fax machine, or similar device over a standard RJ-11 modular
telephone cable, and supplies ringing voltage, dial tone, and similar signals to it. see FXO
Framing
- A procedure for controlling errors. Consists of inserting bits so the receiver can identify the time slots allocated to each subchannel
G
Gatekeeper -
is the central control entity that performs management functions in a Voice and Fax over IP network and for multimedia applications such
as video conferencing. Gatekeepers provide intelligence for the network, including address resolution, authorization, and authentication services, the
logging of call detail records, and communications with network management systems. Gatekeepers also monitor the network for engineering purposes as
well as real-time network management and load balancing, controlling bandwidth, and providing interfaces to existing legacy systems.
Gateway -
an entrance into and out from a communications network. Technically, a gateway is an electronic repeater that intercepts and steers electrical
signals from one network to another.
Greeting
- voice messages that are played to the QX users or users calling to the QX activating specific services.
H
Hold Music
- music played to the party that is on hold.
Host -
an intelligent device attached to the network; can be also a mainframe computer.
Host Name -
the name given to a mainframe computer or device.
Hunt Grouping -
the QX service that allows configuring several users over QX to ring in series when a specific call arrives.
Hypertext Transfer Protocol (HTTP)
- the protocol used by Web browsers and Web servers to transfer files, such as text and graphics files.
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