ADC MM702G2 Manuel D’Utilisation
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LOSSARY
Symbol
10/100Base-T – The Institute of Electrical and Electronic Engineers (IEEE) 802.3 specification for Ethernet over
thin coaxial cable.
thin coaxial cable.
A
AAL2 – ATM Adaptation Layer 2. Used for compressed voice and video that is intolerant of delay. This layer is
used by xDSL technology.
used by 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.
Speed Data transfer. It typically supports all types of data traffic. Originally designed to support TCP/IP.
ADSL – Asymmetric Digital Subscriber Line
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).
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).
decibels (dB).
authentication – Security feature offered through PAP and CHAP with PPP sessions.
BERBit Error Rate is a measure of transmission quality. The ratio of error bits to the total number of bits
transmitted.
transmitted.
B
bps – bit-per-second is the number of bits transferred during each second of data transmission.
C
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.
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.
frame (53 bytes) consisting of a five-byte header and a 48-byte payload.
community string – A text string required for an SNMP trap to be received by a trap receiver(s). Also, a text string
that identifies an SNMP community and is associated with specific access rights (read-only or read/write).
that identifies an SNMP community and is associated with specific access rights (read-only or read/write).
CRC – Cyclic Redundancy Check is a method used to verify the accuracy of data transmission.
D
DHCP – Dynamic Host Configuration Protocol. A TCP/IP protocol that enables PCs to obtain IP addresses from a
DHCP server that dynamically assigns IP addresses.
DHCP server that dynamically assigns IP addresses.
DNS – Domain Naming System. A system for translating names of host computers into IP addresses.
downstream traffic – Communications from a service provider to a user.
E
encapsulation – The inclusion of data in a protocol header prior to transmission, which enables successful data
transmission between different protocol networks.
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.
F
flash memory – Non-volatile memory that can be erased and reprogrammed.
G
G.shdsl – Symmetrical High-Speed Digital Subscriber Line