Appendix E - Glossary

SAGEM F@st™ 800 (PPP) User Guide - 288021372-05
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Glossary
AAL5 ATM Adaptation Layer type 5
ADSL Asymmetric Digital Subscriber Line. Telephon e line with asymmetric
rates (upstream rate: 32 to 896 kbit/s; downstream rate: 32 to
8160 kbit/s)
ARP Address Resolution Protocol. Protocol used to determine an IP
address from a Ethernet address
ATM Asynchronous Transfer Mode
ATU-C ADSL Termination Unit Central office end. Th is refers to ADSL
equipment at the switching center end (of the network operator)
ATU-R ADSL Termination Unit Remote terminal end. This r efers to ADSL
equipment (modem + splitter) installed at the subscriber's prem ises
CO Central Office
CPE Customer Premises Equipment (Terminal)
CRC Cyclic Redundancy Check: Error detection method
DMT Discrete Multi Tone: Transmission method using 256 carriers
DSLAM Digital Subscriber Line Access Multiplexer
FEC Forward Error Correction
HEC ATM cell Header Error Control
ID IDentifier
LAN Local Area Network
LLC Logical Link Control (Encapsulation without header)
MAC Medium Address Control
OAM Operation, Administration and Maintenance
PPP Point to Point Protocol
PPPoA PPP over ATM
PPPoE PPP over Ethernet
RARP Reverse Address Resolution Protocol. Protocol used to determine the
physical address of a machine from its IP address
RFC Request For Comments
RJ11 Standard 6-way miniature connector
RJ45 Standard 8-way miniature connector
UBR Unspecified Bit Rate. Widely used service class
USB Universal Serial Bus. This Bus supports a nominal bit rate of up to
12 Mbit/s
VC Virtual Channel