Interphase Tech iSPAN 5535 PRI - Manual (Page 158)

Glossary
138 Interphase Corporation
MIB (Management Information Base) ◆ The specification that defines
objects for referencing variables such as integers and strings. In gen-
eral, it contains information about the network’s management and per-
formance (for example, traffic parameters). See also IP (Internet
Protocol).
MTU (Maximum Transmission Unit) ◆ The largest packet that can be
sent over a given medium.
multicast ◆ A technique that allows copies of a single packet or cell
to be passed to a set of destinations.
Multi-link PPP ◆ Allows you to combine two or more B-channels into
a single, faster PPP connection. With Multi-link PPP, you can have a
128 Kbps PPP connection over a Basic Rate ISDN line.
NET (Normes Européennes de Télécommunication) ◆ European
standards for approving and testing equipment.
network ◆ An interconnection of multiple stations or systems that are
able to send messages to and receive messages from one another.
NI-1 (National ISDN1) ◆ A specification for a standard ISDN phone
line. National ISDN 1 is intended to be a set of standards to which
every manufacturer’s equipment should conform for maximum
interoperability. NI-2 and NI-3 are future standards currently under
development.
NSAP (Network Services Access Point) ◆ In the OSI environment,
the SAP between the network and the transport layers. It identifies a
Data Terminal Equipment by a unique address.
NT1 (Network Termination 1) ◆ The device that connects to your
ISDN hardware and also works as a converter between an ISDN U
interface and an ISDN S/T interface. An NT1 converts a line from a 2-
wire to a 4-wire connection. Some ISDN adapters have an NT1 already
built into them.
NT2 (Network Termination 2) ◆ An NT2 handles termination for mul-
tiple B channels on a PRI line. NT2s are typically found embedded in
PBXs or switches on network servers which support Primary Rate
Interface (PRI).
OSI (Open Systems Interconnection) Model ◆ The 7-layer protocol
model defined by the ISO for data communications.
PABX ◆ Private Automatic Branch eXchange.
PBX (Private Branch eXchange) ◆ PBX is a private telephone switch.
It is connected to groups of lines from one or more central offices and
to all of the telephones at the location served by the PBX.