Avaya 38DHB0002UKDD Manual Do Utilizador

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Glossary 
Page 141 
Glossary (Cont.) 
IRC 
Internet Relay Chat. A service that enables an Internet users to participate in a conversation 
on line in real time with other users. An IRC channel, maintained by an IRC server, transmits 
the text typed by each user who has joined the channel to all other users who have joined 
the channel. Generally, a channel is dedicated to a particular topic, which may be reflected in 
the channel’s name. An IRC client shows the names of currently active channels enables the 
user to join a channel, and then displays the other participants’ words on individual lines so 
that the user can respond. 
MAPI 
Messaging Application Programming Interface. A Microsoft’s Windows application which is 
part of WOSA (Windows Open Services Architecture). MAPI is a set of API functions and a 
OLE interface that lets messaging clients, such as Microsoft Outlook, interact with various 
message service providers, such as Microsoft Exchange Server and various computer 
telephony servers running under Windows NT server. Overall, MAPI helps Exchange 
manage stored messages and defines the purpose and content of messages – with the 
objective that most end users will never know. 
MSN  
Multiple Subscriber Numbering 
NAT 
Network Address Translation. The process of converting between IP addresses used within 
an intranet or other private network and Internet IP addresses. This approach makes it 
possible to use a large number of addresses within the stub domain without depleting the 
limited number of available numeric Internet IP addresses. 
NNTP 
Network News Transfer Protocol. The Internet protocol that governs the transmission of 
newsgroups. 
POP3  
Post Office Protocol 3. A protocol for servers on the Internet that receive, store, and transmit 
e-mail and for clients on computers that connect to these servers to download and upload e-
mail. 
PAP  
Password Authentication Protocol. A method for verifying the identity of a user attempting to 
log on to a PPP server. Passwords are sent without encryption and the originator can make 
repeated attempts to gain access. This authentication method must be used if encryption is 
not supported at the remote end. 
PPP 
Point to Point Protocol. A protocol which allows a PC to connect as a TCP/IP host to a 
network through an asynchronous port. PPP is commonly used for connection across the 
PSTN from a PC to an ISP for purposes of Internet access. PPP includes error detection and 
data protection features. 
PPTP 
Point-to-Point Tunnelling Protocol. A specification for virtual private networks in which some 
nodes of a local area network are connected through the Internet. 
Q.Sig  See 
DPNSS 
PRI 
Primary Rate Interface. Provides 30B+D running at 1.544 megabits per second and 2.048 
megabits respectively. 
RAS 
Remote Access Services. A feature built into Windows NT that enables users to log into an 
NT-based LAN using a modem, X.25 connection or WAN link. RAS works with several major 
network protocols, including TCP/IP, IPX, and Netbeui. To use RAS from a remote node, you 
need a RAS client program, which is built into most versions of Windows, or any PPP client 
software. For example, most remote control programs work with RAS. 
MAC Address 
The physical address of the hardware device. (Identified at the Media Access Control layer in 
the network architecture.) 
RSVP 
Resource Reservation Setup Protocol. An Internet protocol developed to enable the Internet 
to support specified Qualities-of-Service (QoS's). Using RSVP, an application will be able to 
reserve resources along a route from source to destination. RSVP-enabled routers will then 
schedule and prioritise packets to fulfil the QoS. 
INDeX IPNC Cassette Administration Manual 
Glossary - Page 141 
38DHB0002UKDD – Issue 7 (22/11/02)