Specifications

Manager
An application that receives Simple Network Management Protocol
(SNMP) information from an agent. An agent and manager share a
database of information, called the Management Information Base
(MIB). An agent can use a message called a traps-PDU to send
unsolicited information to the manager. A manager that uses the
RADview MIB can query the RAD device, set parameters, sound
alarms when certain conditions appear, and perform other
administrative tasks.
Master Clock
The source of timing signals (or the signals themselves) that all
network stations use for synchronization.
Multiplexer
At one end of a communications link, a device that combines
several lower speed transmission channels into a single high speed
channel. A multiplexer at the other end reverses the process.
Sometimes called a mux. See Bit Interleaving/Multiplexing.
Network
(1) An interconnected group of nodes. (2) A series of points,
nodes, or stations connected by communications channels; the
collection of equipment through which connections are made
between data stations.
Node
A point of interconnection to a network.
Packet
An ordered group of data and control signals transmitted through
a network, as a subset of a larger message.
Payload
The 48-byte segment of the ATM cell containing user data. Any
adaptation of user data via the AAL will take place within the
payload.
Physical Layer
Layer 1 of the OSI model. The layer concerned with electrical,
mechanical, and handshaking procedures over the interface
connecting a device to the transmission medium.
Policing
A method for verifying that the incoming VC complies with the
user’s service contract.
Port
The physical interface to a computer or multiplexer, for connection
of terminals and modems.
Prioritization
Also called CoS (class of service), classifies traffic into categories
such as high, medium, and low. The lower the priority, the more
“drop eligible” is a packet. When the network gets busy,
prioritization ensures critical or high-rated traffic is passed first,
and packets from the lowest categories may be dropped.
Protocol
A formal set of conventions governing the formatting and relative
timing of message exchange between two communicating
systems.