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F
Facility
Transmission facilities. Usually a two metallic pair set of cords, but can be telephone company carriers, T-1,
microwave or dial-up telecommunications lines.
FRAD
Frame Relay Access Device. A FRAD is responsible for framing data with header and trailer information prior to
presentation of the frame to a frame relay switch. A FRAD may be a standalone device, although the function
generally is embedded in a router.
Frame Relay
An access standard delivered by local and long distance carriers, which can accommodate voice packets of
various sizes associated with virtually any protocol.
FTP
File Transfer Protocol. A connection protocol used to send and receive files.
G
G.729A
The ITU (International Telecommunications Union) standard voice algorithm for the coding of speech signals in
telecommunication networks.
H
H.323
This ITU (International Telecommunications Union) standard defines a set of call control, channel set up and
codec specifications for transmitting voice over networks that do not guarantee quality of service -such as the
Internet.
HOP
The number of devices an IP address must connect to, to get to it's destination.
Host Name
The name of a computer or HOST as specified on a DNS server.
I
ISDN
Integrated Services Digital Network.
for the desktop, and PRI, which is 1,544,000 bps and designed for telephone switches. BRI uses four unshielded
normal telephone wires (two twisted pairs) to deliver two "Bearer" (B channel) of 64K bps each and one "data" (D
channel) of 16K bps.
IP
Internet Protocol. The most important protocol on which the Internet is based. The IP Protocol is a standard
describing software that keeps track of the internetwork addresses for different nodes, routes outgoing messages,
and recognizes incoming messages.
PBXgateway II System Administrator's Guide
ISDN comes in two basic flavors-BRI, which is 144,000 bps and designed
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