ADC MM701G User Manual download pdf (Page 159)

Appendix D: Glossary

MM701G and MM702G User Manual 151

MAC

Media Access Control is a physical address associated with a device such as a NIC.

For modem configuration, the MAC is used to map inbound traffic (from a remote IP

address) to an internal (LAN) IP address. Used with 1483 Bridging/Routing Mode.

margin

The noise margin in decibels that the modem must achieve with a BER of 10

-7

better to successfully complete initialization.

MIB

Management Information Base is a set of variables that define the configuration and

status parameters for network management. Network management stations can

retrieve information from and write information to an MIB. The Internet Engineering

Task Force (IETF) specifies standard MIBS for certain types of devices, ensuring any

NMS can manage the devices. Vendors can specify proprietary MIBs for their devices

to fit specific needs.

NAT

Network Address Translation provides the means to map private IP addresses (LAN

IP addresses) to public IP addresses (WAN session IP addresses).

NVRAM

Non-Volatile Random Access Memory is a medium for storing system configuration

information, so the information is not lost when the system is reset.

octet

A TCP/IP term indicating eight bits.

PAP/CHAP

Password Authentication Protocol and Challenge Handshake Authentication Protocol

are two ways to authenticate PPP sessions. With PAP, the modem sends

authentication requests to the service provider and authentication occurs only once

during the life of the link.

In CHAP, the service provider returns an authentication challenge to the modem

during authentication. CHAP can be renegotiated during the life of the link. Also, both

the modem and the service provider must support clear text versions of the

password. The CHAP host field must be the same on both ends of the session.

PDU

Protocol Data Unit is data as it appears at the interface between a particular sublayer

and the sublayer immediately below.

POTS

Plain Old Telephone Service.

PPP

Point-to-Point Protocol exists between the hardware layer and the network-layer

interface protocols. It is a widely used protocol for establishing connections on the

Internet. PPP provides the set up and release of connections for each session.

PAP/CHAP provide the authentication for the PPP sessions.

proxy IP address

The proxy IP address is the WAN IP address for one of the 32 sessions. The proxy

IP address is used to enter static NAT entries. See IP address.

PVC

Permanent Virtual Circuit is a logical connection comprised of a predefined static

route across a packet-switched network that is always in place and always available.

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