SWAN Concentrator and WAN Subsystem Troubleshooting Guide

Glossary
SWAN Concentrator and WAN Subsystem Troubleshooting Guide—426992-008
Glossary-7
IOAM
cable has a 50-pin connector that connects to any WAN port on a SWAN or SWAN 2
concentrator. The other end of each cable is a connector that conforms in size and
pinout to one of the supported interfaces.
IOAM. See Input/Output Adapter Module (IOAM).
IOP. See Input/Output Adapter Module (IOAM).
KB or KByte. Kilobyte: 1024 bytes of data.
Kbps. Kilobits per second. A data rate equal to 1000 bits per second (bps). See also bits
per second (bps) and Megabits per second (Mbps).
local area network (LAN). A LAN provides access to devices distributed within a local
campus. LAN clocking rates are typically 10 Megabits per second (Mbps) or greater. A
LAN is a network such as Ethernet, token ring, or FDDI.
MAC address. See media access control (MAC) address.
media access control (MAC) address. A MAC address is a value in the Medium Access
Control sublayer of the IEEE/ISO/ANSI LAN architecture that uniquely identifies an
individual station that implements a single point of physical attachment to a LAN. The
SWAN concentrator is assigned six MAC addresses at manufacturing time and the
SWAN 2 concentrator is assigned 12 MAC addresses. See also ServerNet wide area
network (SWAN) concentrator and ServerNet wide area network (SWAN) 2
concentrator.
Megabits per second (Mbps). A data rate equal to 1,048,576 bits per second (bps).
MHz. Megahertz. One million cycles per second.
modem. A device for performing necessary signal transformation between terminal devices
and data communications lines. Modems are used in pairs, one at either end of a data
communications line. See also data circuit-terminating equipment (DCE) and data
terminal equipment (DTE).
modular ServerNet expansion board (MSEB). A ServerNet expansion board (SEB)
that
uses plug-in cards (PICs) to provide a choice of connection media for routing
ServerNet packets.
MSEB. See modular ServerNet expansion board (MSEB).
multiplexed. The action of separating data traffic from one line onto several distinct lines or
of combining data traffic from several distinct lines into one line.
node. An individual NonStop system within a network of such systems.
object identifier (OID). A value (distinguishable from all other such values) that is
associated with an information object.