ATL Telecom AM200 - Manual (Page 138)

ATL User Guide
AM200 Modem 138
18 Appendix 1 Glossary
10BaseT Connection to Ethernet using twisted pair cable and RJ-45 connectors. At 10 Mbps,
the recommended limit on segment length is 100m.
100BaseT Name for Fast Ethernet family of standards using twisted pair cable for transmission
at 100Mbps.
802.2 See IEEE 802.2
802.3 See IEEE 802.3
Access List In a router, a list of which addresses are allowed access to which services. An access
list is used to control traffic both to and from the router.
Address Mapping The translation of addresses from one protocol's format to another, so that
equipment using different protocols can work together.
Address Resolution Any means of overcoming the difference between two different address systems on
a network. In particular, a means of mapping addressed at the Network Layer in the
OSI model to addresses in the Data-Link Layer.
Agent A component of network and desktop management software, such as SNMP, that
gathers information from the MIB.
Analogue Analogue transmission is achieved by adding signals of varying frequency or
amplitude to carrier signals of a given frequency. A modem is used to convert digital
information to analogue signals for transmission over leased lines and to convert
analogue phone signals to digital information.
ARP Address Resolution Protocol, used to resolve IP addresses into physical network
addresses. IP hosts use this protocol when they know the IP address of a host but not
it's physical (Ethernet) address. ARP is defined in RFC-826
ATM Asynchronous Transfer Mode. A high-speed cell-switching network technology that
handles data and real-time voice and video. ATM is defined in the Broadband ISDN
standard and provides "bandwidth on demand" by charging customers for the
amount of data they send
Baseband Transmission where digital signals are placed onto the transmission line with no
change in their modulation and using the full channel bandwidth. Baseband circuits
are usually provided by network operators via leased lines.
Baud Unit of signalling speed. The speed in baud is the number of line changes (in
frequency, amplitude etc) or events per second. At low speeds, each event represents
only one bit condition and baud rate equals bps. As speed increases, each event
represents more than on bit and baud rate does not truly equal bps.
BER (Bit Error Rate) A ratio of the number of errors received on a digital circuit.