ADC 410F - Manual (Page 96)

Appendix C: Glossary
88 Megabit Modem 410F and 420F User Manual
DMT Discrete Multi-Tone is a modulation coding for an ADSL line. DMT is the modulation
technology used for the Megabit Modem 410F and 420F ADSL.
downstream
traffic Communications from the Megabit Modem 410F to the 420F.
encapsulation The inclusion of data in a protocol header prior to transmission, which enables
successful data transmission between different protocol networks.
ES Errored Seconds is the seconds during which errors occur that prevent the payload
from being corrected.
Ethernet A protocol used for LAN traffic, which has a transfer rate of 10 or 100 Mbps.
flash memory Non-volatile memory that can be erased and reprogrammed.
gateway A device (generally a router) that provides translation services to allow
communication between two dissimilar networks.
IP Internet Protocol is a TCP/IP protocol that controls packet transmission.
IP address A 32-bit address used in IP routing. The address consists of four octets separated by
decimals. The octets comprise a network section, a subnet section (optional) and a
host section.
LAN Local Area Network is a physically connected group of devices between which data
transmission occurs at high speeds over relatively short distances.
LLC Logical Link Control is an encapsulation protocol for data that you transmit from the
modem over the WAN in RFC 1483 Bridging/Routing mode.
LOF Loss Of Frame is an error indicating that the receiving equipment has lost a frame.
LOS Loss Of Signal is an error indicating that the receiving equipment has lost the signal.
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 RFC 1483 Bridging/Routing
mode.
margin The noise margin in decibels that the modem must achieve with a BER of 10 -7 or
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.