Vodavi ip-7008d ユーザーガイド

Glossary  

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December, 2005  

 

Vodavi Telenium

Product Guide 

 

mobility ▪ presence ▪ collaboration ▪ convergence 

 

An evolving family of specifications for wireless LANs, developed by a working group of the 
Institute of Electrical and Electronics Engineers(IEEE). 802.11 standards use the Ethernet protocol 
and CSMA/CA (carrier sense multiple access with collision avoidance) for path sharing. 

Power Over Ethernet (PoE) defines a standard way for network devices to be powered by LAN 
cabling of Category 5 or higher. The wire pairs that are not used for the Ethernet/Fast Ethernet 
signals carry DC electric current.  802.3af PoE enables devices to operate without a separate 
power source, and enables the centralization of backup power. 

Access Point (AP): a station that transmits and receives data (sometimes referred to as a 
transceiver). An access point connects users to other users within the network and also can serve 
as the point of interconnection between the WLAN and a fixed wire network. The number of 
access points a WLAN needs is determined by the number of users and the size of the network. 

access point mapping (also called war driving): the act of locating and possibly exploiting 
connections to WLANs while driving around a city or elsewhere. To do war driving, you need a 
vehicle, a computer (which can be a laptop), a wireless Ethernet card set to work in promiscuous 
mode, and some kind of an antenna which can be mounted on top of or positioned inside the car. 
Because a WLAN may have a range that extends beyond an office building, an outside user may 
be able to intrude into the network, obtain a free Internet connection, and possibly gain access to 
company records and other resources. 

Automatic Call Distribution:  Software that routes incoming calls among a group of call center 
agents. The ACD programming may be in a phone switch or a server. 

A LAN or other small network, especially one with wireless or temporary plug-in connections, in 
which some of the network devices are part of the network only for the duration of a 
communications session. 

Also Single-Line Telephone.  Analog voice technology involves converting spoken sound into 
electrical pulses on a wire pair.  

In binary arithmetic, a term that is used to describe the addition of two binary numbers. The AND 
logic is used by a network host to determine mathematically whether the receiving host is on a 
local or remote network. 

A specialized transducer that converts radio-frequency (RF) fields into alternating current (AC) or 
vice-versa. There are two basic types: the receiving antenna, which intercepts RF energy and 
delivers AC to electronic equipment, and the transmitting antenna, which is fed with AC from 
electronic equipment and generates an RF field. 

See Access Point 

Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol address (IP 
address) to a physical machine address (MAC address) that is recognized in the local network. A 
table is used to maintain a correlation between each MAC address and its corresponding IP 
address. 

ASN.1 (Abstract Syntax Notation One) is a standard way to describe a message (a unit of 
application data) that can be sent or received in a network. ASN.1 is divided into two parts: (1) 
the rules of syntax for describing the contents of a message in terms of data type and content 
sequence or structure and (2) how you actually encode each data item in a message.  

Asynchronous Transfer Mode.  A dedicated-connection switching technology that organizes digital 
data into 53-byte cell units and transmits them over a physical medium using digital signal 
technology. Individually, a cell is processed asynchronously relative to other related cells and is 
queued before being multiplexed over the transmission path.