3Com Nbx 100 And Ss3 Nbx Administration Guide

GLOSSARY471
intelligent hubSee managed hub.
IPInternet Protocol. The TCP/IP standard protocol that defines the IP 
datagram as the unit of information passed across an Internet. IP provides 
the basis for connectionless packet delivery service.
IP addressThe address used by devices on the network to establish their unique 
identity. IP addresses are composed of four fields separated by dots. Each 
field is an 8-bit number (0 through 255). IP addresses can be permanently 
assigned, or they can be...

472GLOSSARY
latencyThe sum of all the delays in an end-to-end connection.
layeringThe process of dividing complex software up into several layers, each of 
which performs a specific task. Layering allows faster and easier software 
development and is often used in public, open software.
LCDLiquid Crystal Display. A low cost display technology. 
LLCLogical Link Control. A data link protocol for LANs that is part of the IEEE 
802.2 standard and common to all LAN standards for OSI model data 
link, level...

GLOSSARY473
multiplexerA device that can send several signals over a single line. A similar device 
at the other end of the link then separates the signals. 
multi-taskingThe concurrent execution of two or more tasks or the concurrent use of a 
single program that can carry out many functions.
NCPNetwork Call Processor. The device that manages call traffic, voice mail, 
the Auto Attendant, and related applications in an NBX system.
NetBEUINetBios Extended User Interface. A network device driver or...

474GLOSSARY
NOSNetwork Operating System. Software that connects all the devices on a 
network so that resources can be shared efficiently and managed from a 
central location. Novell NetWare is one example of a network operating 
system.
OEMOriginal Equipment Manufacturer. The maker of a product or component 
that is marketed by another vendor, integrator, VAR (Value Added 
Reseller), or reseller. 
off-hookThe state of a telephone line that allows dialing and transmission but 
prohibits incoming calls...

GLOSSARY475
packet switchingA method of switching data in a network. Individual packets of a set size 
and format are accepted by the network and delivered to their 
destination. The sequence of packets is maintained, and destination 
established, by the exchange of control information (also contained in the 
packets) between the sending terminal and the network before the 
transmission starts. 
paging1) A communications service that includes a one-way beeper service, 
one-way text service, and two-way...

476GLOSSARY
preview dialingAutomated dialing feature in which CTI software queues the next call to 
be made but allows you to check and activate the call. 
PRIPrimary Rate Interface. An ISDN service for users with large bandwidth 
requirements, such as large PBXs or high performance video desktop 
conferencing systems; the ISDN equivalent of a T1 circuit. 
protocolA set of rules governing the information flow within a communications 
infrastructure. A protocol typically specifies the structure of...

GLOSSARY477
RMONRemote Monitoring. A facet of SNMP-based network management, the 
RMON MIB (Management Information Base) defines the standard 
network monitoring functions for communication between SNMP-based 
management consoles and remote monitors. A typical MIB captures 
information about a device, but RMON captures information about traffic 
between devices. 
RJ-11A four-wire modular connector used by the telephone system. 
RJ-45An eight-wire modular connector used by telephone systems. The...

478GLOSSARY
STPShielded Twisted Pair. A twisted pair of wires surrounded by a shield that 
is typically made of braided wire or metal foil.
switched EthernetAn Ethernet network that allows each user the full Ethernet bandwidth of 
10 Mbit/s to another node. 
system-wide
greetingsA special type of time-dependent greeting that is used throughout the 
system.
T1/E1A high-speed data channel that can handle 24 voice or data channels (T1) 
or 30 voice or data channels (E1) at 64Kbit/s. Refers to the U.S. T1...

GLOSSARY479
translationThe process of interpreting or modifying dialed digits for incoming or 
outgoing calls and allows the call to progress through the network. 
trunkA communications channel between two points. It often refers to 
large-bandwidth telephone channels between major switching centers, 
capable of transmitting many simultaneous voice and data signals.
twisted pairTwo insulated wires twisted together with the twists varied in length to 
reduce potential signal interference between the...

480GLOSSARY