Quadro SW-Version 4.1.x User's Guide download pdf (Page 40)

Quadro Manual III: Extension User's Guide Appendix: Glossary

Quadro2x, 2xi, Quadro4x, 4xi, 4xa, Quadro16x, 16xi; (SW Version 4.1.x) 40

Domain name - in a network using the TCP/IP, the full domain name consists of a sequence of names (labels) separated by periods (dots), for

example, Quadro.epygi.com.

Domain Name System (DNS) - a system used on the Internet for translating names of network nodes into their addresses.

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 assogned 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.

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 Quadro.

External User - users connecting Quadro by IP or PSTN calls.

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

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, controling 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 Quadro users or users calling to the Quadro activating specific services.

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 Quadro service that allows configuring several users over Quadro 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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Quadro SW-Version 4.1.x User's Guide Page 40

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