NS3000/iX NMMGR Screens Reference Manual - Edition 9 (36922-90040)

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event log One of three circular files stored
on the OpenView windows workstation. It
contains lists of events that are reported by
the DTCs for which it is responsible.
extended packet sequence numbering
One of the optional Network Subscribed
Facilities that provides packet sequence
numbering using modulo 128. If not
subscribed, modulo 8 is used.
F
facility An optional service offered by a
packet switching network's administration
and requested by the user either at the
time of subscription for network access or
at the time a call is made. Also known as
user facility.
facility set A facility set defines the
various X.25 connection parameters and
X.25 facilities that can be negotiated for
each virtual circuit on a per-call basis.
fast select An optional packet-switching
network facility by which user data can be
transmitted as part of the control packets
that establish and clear a virtual
connection.
FCS FrameCheck Sequence.A sequence of
bits generated by X.25 at Level 2 that
forms part of the frame and guarantees the
integrity of its frame’s contents. The FCS is
also used by the IEEE 802.3 protocol to
check the validity of frames.
FDDI Fiber Distributed Data Interface. A
set of ANSI standards that define a 100
Mb/s timed token passing protocol LAN
that uses fiber optic cable as the
transmission medium. FDDI is a
specification for a high-speed fiber-optic
ring network.
file equation An assignment statement
used to associate a file with a specific
device or type of device during execution of
a program.
file number A unique number associated
with a file when the file is opened. The file
number is returned in the FOPEN or
HPFOPEN call used to open the file. It can
be used to access that file until the file is
closed.
file specification The name and location
of a file. The full specification for a file
includes the file name, group, and account.
file system The part of the operating
system that handles access to input/output
devices (including those connected through
the DTC), data blocking, buffering, data
transfers, and deblocking.
flow control A means of regulating the
rate at which data transfer takes place
between devices to protect against data
overruns.
flow control negotiation One of the
network subscribed facilities selected at
subscription time. This facility allows the
Flow Control parameter to be negotiated at
call set-up time, as opposed to having a
predefined value.
formal file designator A name that can
be used programmatically or in a file
equation to refer to a file.
FOS Fundamental Operating System. The
programs, utilities, and subsystems
supplied on the Master Installation Tape
that form the basic core of the operating
system.
full gateway A full gateway is a node that
belongs to more than one network and has
one IP address for each network. It uses
store and forward to transfer packets
between each network that it belongs to.