Prestige 1600 Universal Access Concentrator

 

 

recommendations about telephone and data (including fax) communications systems for service

 

 

providers and suppliers.

 

 

 

LAN

 

Local Area Network is a shared communication system to which many computers are attached.

 

 

A LAN, as its name implies, is limited to a local area. This has to do more with the electrical

 

 

characteristics of the medium than the fact that many early LANs were designed for

 

 

departments, although the latter accurately describes a LAN as well. LANs have different

 

 

topologies, the most common being the linear bus and the star configuration.

 

 

 

LEC

 

Local Exchange Carrier: one of the new U.S. telephone access and service providers that have

 

 

grown up with the recent U.S. deregulation of telecommunications.

 

 

 

MAC

 

On a local area network (LAN) or other network, the MAC (Media Access Control) address is

 

 

your computer's unique hardware number. (On an Ethernet LAN, it is the same as your Ethernet

 

 

address.) The MAC layer frames data for transmission over the network, then passes the frame

 

 

to the physical layer interface where it is transmitted as a stream of bits.

 

 

 

NAT

 

Network Address Translation is the translation of an Internet Protocol address used within one

 

 

network to a different IP address known within another network - see also SUA.

 

 

 

NAT Server Set

 

A NAT server set is a list of inside servers (behind NAT on the LAN) that you can make visible to

 

 

the outside world.

 

 

 

NDIS

 

Network Driver Interface Specification is a Windows® specification for how communication

 

 

protocol programs (such as TCP/IP) and network device drivers should communicate with each

 

 

other.

 

 

 

Network

 

Any time you connect two or more computers together so that they can share resources, you

 

 

have a computer network. Connect two or more networks together and you have an internet.

 

 

 

NIC

 

Network Interface Card. A board that provides network communication capabilities to and from a

 

 

computer system. Also called an adapter.

 

 

 

Node

 

Any single computer connected to a network.

 

 

 

PAP

 

Password Authentication Protocol PAP is a security protocol that requires users to enter a

 

 

password before accessing a secure system. The user’s name and password are sent over the

 

 

wire to a server, where they are compared with a database of user account names and

 

 

passwords. This technique is vulnerable to wiretapping (eavesdropping) because the password

 

 

can be captured and used by someone to log onto the system.

 

 

 

Port

 

An Internet port refers to a number that is part of a URL, appearing after a colon (:) right after

 

 

the domain name. Every service on an Internet server listens on a particular port number on that

 

 

server. Most services have standard port numbers, e.g. Web servers normally listen on port 80.

 

 

 

POTS

 

Plain Old Telephone Service is the analog telephone service that runs over copper twisted-pair

 

 

wires and is based on the original Bell telephone system. Twisted-pair wires connect homes and

 

 

businesses to a neighborhood central office. This is called the local loop. The central office is

 

 

connected to other central offices and long-distance facilities.

 

 

 

PPP

 

Point to Point Protocol. PPP encapsulates and transmits IP (Internet Protocol) datagrams over

 

 

serial point-to-point links. PPP works with other protocols such as IPX (Internetwork Packet

 

 

Exchange). The protocol is defined in IETF (Internet Engineering Task Force) RFC 1661

 

 

through 1663. PPP provides router-to-router, host-to-router and host-to-host connections.

 

 

 

Primary

 

The P1600 in primary mode provides concentration, network management, Internet access and

 

 

routing functions as well as uses the FlexWan port as the interface to the trunk.

 

 

 

PSTN

 

Public Switched Telephone Network was put into place many years ago as a voice telephone

 

 

call-switching system. The system transmits voice calls as analog signals across copper twisted

 

 

cables from homes and businesses to neighborhood COs (central offices); this is often called

 

 

the local loop. The PSTN is a circuit-switched system, meaning that an end-to-end private circuit

 

 

is established between caller and callee.

 

 

 

PTT

 

The generic European name is usually used to refer to state-owned telephone companies.

 

 

 

PVC

 

Permanent Virtual Circuit. A PVC is a logical point-to-point circuit between customer sites. PVCs

 

 

are low-delay circuits because routing decisions do not need to be made along the way.

 

 

Permanent means that the circuit is preprogrammed by the carrier as a path through the

 

 

network. It does not need to be set up or torn down for each session.

 

 

 

RADIUS

 

Remote Authentication Dial-In User Service (RADIUS). A client/server security protocol created

 

 

by Livingston Enterprises. Security information is stored in a central location, known as the

 

 

RADIUS server.

 

 

 

L

Glossary