User's Manual

GLOSSARY
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© RF Innovations Pty Ltd, 1998 Page: 100
234839, Revision 2.2
On-line Time
The amount of time spent on-line with an information service.
P
PABX
Private Automatic Branch Exchange. An automatic switchboard for handling large concentrations of telephones (extensions).
Packet
Group of bits including data and control elements that are transmitted as a whole.
Packet Switched Network
System where messages are transmitted in packets, each individually addressed and routed through the network.
Packet Timer
Sends the packet of information when no information has been received for the specified length of time.
Parity
A simple method of error checking by which the number of data bits received are added together to ensure that the correct
number have been received.
Password
Password protection for the menu to prohibit unauthorised menu access and the ability to alter the radio’s settings. Consists
of 12 to 18 Alphanumeric characters.
Peripheral (Peripheral Device)
A device, such as a video monitor, disk drive, printer or modem, used in conjunction with a computer. Often (but not
necessarily) physically separate from the computer and connected to it by wires, cables or some other form of interface.
Physical Layer Logging
Shows the modem statistics relating to the quantity of data throughput.
Point-to-Multipoint Communication
One radio (the master) communicates with more that one slave, while each slave can only talk to the master. As opposed to
Point-to-Point Communication.
Point-to-Point Communication
A connection between two points only. Communications established automatically with the RFI-9256 and is not controlled
by the AT commands. As opposed to Point to Multipoint Communication..
Port
The point of connection, usually a physical connector, between a computer and a peripheral device, another computer or a
network.
Propagation Delay
The time required for a signal to travel from one end of a circuit to another.
Protocol
A set of conventions controlling the timing and format of data communications between two pieces of communications
equipment.
Public Switched Telephone Network (PSTN)
Telephone system providing circuit switching to many customers.
Pulse
An abrupt and relatively short change in voltage, either positive or negative resulting in the conveyance of data in a circuit.
R
RAM
Random Access Memory. RFI-9256 has 64k on board. See technical specifications page.
Received Line Signal Detector
See Carrier Detect.