ADC MM701G User Manual download pdf (Page 97)

MM701G User Manual 91

GLOSSARY

10Base-T The Institute of Electrical and Electronic Engineers (IEEE) 802.3 specification for

Ethernet over thin coaxial cable.

AAL2 ATM Adaptation Layer 2. Used for compressed voice and video that is intolerant of

delay. This layer is used by G.shdsl xDSL technology.

AAL5 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.

ATM 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).

attenuation The dissipation of the power of a transmitted signal as it travels over copper wire,

measured in decibels (dB).

authentication Security feature offered through PAP and CHAP with PPP sessions.

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

number of bits transmitted.

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

transmission.

CBR 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.

cell 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.

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ADC MM701G User Manual Page 97