Specifications

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.
parameters
Parameters are often called arguments, and the two words are used
interchangeably. However, some computer languages such as C
define argument to mean actual parameter (i.e., the value), and
parameter to mean formal parameter. In RAD CLI, parameter means
formal parameter, not value.
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.
Port
The physical interface to a computer or multiplexer, for connection
of terminals and modems.
Protocol
A formal set of conventions governing the formatting and relative
timing of message exchange between two communicating systems.
SFP (Small Form-
factor Pluggable)
A compact optical transceiver used in optical communications. It
interfaces a network device (a switch, router or similar device) to a
fiber optic or unshielded twisted pair networking cable. It is a
popular industry format.
Single Mode
Describing an optical wave-guide or fiber that is designed to
propagate light of only a single wavelength (typically 5-10 microns in
diameter).
Space
In telecommunications, the absence of a signal. Equivalent to a
binary 0.
Synchronous
Transmission
Transmission in which data bits are sent at a fixed rate, with the
transmitter and receiver synchronized.
T1
A digital transmission link with a capacity of 1.544 Mbps used in
North America. Typically channelized into 24 DS0s, each capable of
carrying a single voice conversation or data stream. Uses two pairs
of twisted pair wires.
T3
A digital transmission link with a capacity of 45 Mbps, or 28 T1 lines.