IBM Cloud Object Storage System Slicestor 2212 Series, Service And Maintenance Manual

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FR. Frame relay.
FRAD. Frame relay access device.
frame relay. (1) An interface standard describing the
boundary between a user's equipment and a fast-packet
network. In frame-relay systems, flawed frames are
discarded; recovery comes end-to-end rather than
hop-by-hop. (2) A technique derived from the
integrated services digital network (ISDN) D channel
standard. It assumes that connections are reliable and
dispenses with the overhead of error detection and
control within the network.
frequency. The rate of signal oscillation, expressed in
hertz.
FRFH. Frame relay frame handler.
FRTE. Frame relay terminal equipment.
FRU. Field replaceable unit.
FTP. File Transfer Protocol.
FXO. Foreign Exchange Office.
FXS. Foreign Exchange Station.
G
gateway. (1) A functional unit that interconnects two
computer networks with different network architectures.
A gateway connects networks or systems of different
architectures. A bridge interconnects networks or
systems with the same or similar architectures. (T)
(2) In the IBM Token-Ring Network, a device and its
associated software that connect a local area network
to another local area network or a host that uses
different logical link protocols.
Gbps. Gigabits per second (1 000 000 000 bits per
second).
GUI. Graphical user interface.
H
HDLC. High-level data link control.
high-level data link control (HDLC). An access
service used over data networks. It uses a non-real-time
connection.
HDLC-like data link control, for example:
¹
Synchronous data link control (SDLC) used with
SNA, or
¹
Link access procedure for D-channel (LAP-D) used
with ISDN.
high-performance file system (HPFS). In the OS/2
operating system, an installable file system that uses
high-speed buffer storage, known as a cache, to
provide fast access to large disk volumes. The file
system also supports the coexistence of multiple, active
file systems on a single personal computer, with the
capability of multiple and different storage devices. File
names used with the HPFS can have as many as 254
characters.
high-performance routing (HPR). An addition to the
Advanced Peer-to-Peer Networking (APPN) architecture
that enhances data routing performance and reliability,
especially when using high-speed links.
hot pluggable. Refers to an hardware component that
can be installed or removed without disturbing the
operation of any other resource that is not connected to,
or dependant on, this component.
HPDT. High-Performance Data Transfer.
HPFS. High-performance file system.
hub (intelligent). A wiring concentrator, such as the
IBM 8260, that provides bridging and routing functions
for LANs with different cables and protocols.
I
IDNX. Integrated Digital Network Exchange.
IEEE. Institute of Electrical and Electronics Engineers.
impedance. The combined effect of resistance,
inductance, and capacitance on a signal at a given
frequency.
integrated services digital network (ISDN). A digital
end-to-end telecommunication network that supports
multiple services including, but not limited to, voice and
data.
Note: ISDNs are used in public and private network
architectures.
interface. (1) A shared boundary between two
functional units, defined by functional characteristics,
signal characteristics, or other characteristics, as
appropriate. The concept includes the specification of
the connection of two devices having different
functions. (T) (2) Hardware, software, or both, that links
systems, programs, or devices.
Intermediate Session Routing (ISR). A type of
routing function within an APPN network node that
provides session-level flow control and outage reporting
for all sessions that pass through the node but whose
end points are elsewhere.
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2212 Service and Maintenance