ADC 410F - Manual (Page 98)

Appendix C: Glossary
90 Megabit Modem 410F and 420F User Manual
TFTP Trivial File Transfer Protocol is a protocol used to download card images or other files
from an external TFTP server to the NVRAM of any installed cards, or to upload files
from an installed card to an external TFTP server.
trap receivers PCs configured to receive SNMP traps (messages).
traps Autonomous, interrupt-driven, SNMP messages sent from a managed node to a
network management station to indicate that an event has occurred.
UAS UnAvailable Seconds is the number of seconds during which the line is unavailable.
UBR Unspecified Bit Rate is an ATM traffic type used for LAN traffic. When network
congestion occurs, the data is stored in a buffer until it can be sent.
UDP User Datagram Protocol is a transport protocol used to map inbound traffic (from a
remote IP address) to an internal (LAN) IP address. Uses a protocol port number for
the destination at the remote location.
upstream traffic Communications from the Megabit Modem 420F to the 410F.
VCMUX Virtual Channel Multiplexer-based encapsulation used for networks with large
numbers of virtual channels making it practical to carry a single protocol per virtual
channel.
VC Virtual Channel is a logical connection in the ATM network over which ATM cells are
transmitted.
WAN Wide Area Network is a network consisting of nodes located across a large
geographical area. Also, the connection between the Megabit Modem 410F and 420F.