Installing and Administering HP EISA FDDI/9000 and HP HSC FDDI/9000

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Glossary
S
SAC (Single Attachment
Concentrator) A concentrator that
offers one S port for attachment to
the FDDI network and M ports for
the attachment of stations or other
concentrators.
SAS (Single Attachment
Station) An FDDI station that
offers one S port for attachment to
the FDDI ring.
services A set of functions proved
by one OSI/ISO layer or sublayer
entity, for use by a higher layer or
sublayer entity or by management
entities.
Session layer Layer 5 in the OSI
model; defines protocols governing
communications between
applications.
SIF (Station Information
Frame) Special frames used by the
SMT Frame Services within the
Station Management (SMT)
function of an FDDI station that
contain more information about the
station’s configuration and
characteristics than the associated
Neighborhood Information Frame
(NIF). This information can be used
to create a physical ring map that
shows the position of each station in
both the token path and the network
topology.
single mode A small-core (9
micron) optical fiber through which
only one mode can propagate.
Slave A memory or I/O device that
uses EISA control signals to
interface to the bus.
Slot Specific Signal Each
connector has a unique variant of the
signal (instead of a single signal that
is bused to all connnectors).
SMT (Station Management) An
entity within a network station on an
FDDI ring that monitors station
activity and exercises control over
station activity. The standard
defines how to manage the Physical
Layer Medium Dependent (PMD),
the Physical Layer Protocol (PHY),
and the Media Access Control
(MAC) portions of FDDI.
SMT Frame Services That
portion of Station Management
(SMT) that provides the means to
control and observe the FDDI
network. The service uses