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Appendix D - Glossary
SAGEM F@st™ 800 / 840 (PPP) User Guide - 288 047 975-02
Page D-2
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Glossary
AAL5
ATM Adaptation Layer type 5
ADSL
Asymmetric Digital Subscriber Line. Telephone 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. This refers to ADSL
equipment at the switching center end (of the network operator)
ATU-R
ADSL Termination Unit Remote terminal end. This refers to ADSL
equipment (modem + splitter) installed at the subscriber's premises
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
ISDN
Integrated Service Digital Network
LAN
Local Area Network
LLC
Logical Link Control (Encapsulation with header)
MAC
Medium Address Control
NT
Network Terminal
OAM
Operation, Administration and Maintenance
PPP
Point to Point Protocol
PPPoA
PPP over ATM
PPPoE
PPP over Ethernet
PSTN
Public Switched Telephonic Network
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