ADC MM702G Manuel D’Utilisation

The Institute of Electrical and Electronic Engineers (IEEE) 802.3 specification for 
Ethernet over thin coaxial cable.

ATM Adaptation Layer 2. Used for compressed voice and video that is intolerant of 
delay. This layer is used by xDSL technology.

ATM Adaptation Layer 5. AAL5 has been adopted by the ATM Forum from a Class of 
Service called High Speed Data transfer. It typically supports all types of data traffic. 
Originally designed to support TCP/IP.

Asynchronous Transfer Mode is a high bandwidth, low delay, connection-oriented, 
packet-like switching and multiplexing technique that uses 53-byte fixed-size cells to 
transmit voice, video and data over a network. ATM layers define how cells are 
formatted and provides the transport of the fixed length cells between the modem 
and the service provider (or endpoints of the virtual connection).

The dissipation of the power of a transmitted signal as it travels over copper wire, 
measured in decibels (dB).

Security feature offered through PAP and CHAP with PPP sessions.

Bit Error Rate is a measure of transmission quality. The ratio of error bits to the total 
number of bits transmitted.

bit-per-second is the number of bits transferred during each second of data 
transmission.

Constant Bit Rate is a Service Class for the modem. It provides constant bit rate data 
with a timing relationship between the source and the destination. Also, a traffic class 
that carries a guaranteed constant bandwidth. Best suited for applications that require 
fixed bandwidth, such as uncompressed voice, video and circuit emulation. CBR is a 
Quality of Service class defined by the ATM Forum for ATM networks.

A fixed-length packet.  Also, the unit of data transmission used in ATM. Each ATM cell 
contains a fixed-size frame (53 bytes) consisting of a five-byte header and a 48-byte 
payload.