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Switching
T
TCP
TDR
TTL
Tx
U
UBR
A B C D E F G H I
Issue 7 - 05/02
An ATM network is comprised of a collection of ATM
switches and the end systems (users) attached to them.
In ATM switching, cells are received on one port of a
switch. The switch then identifies the port through
which the cell is to be forwarded to the next device,
based on information in the cell header.
Transmission Control Protocol - originally developed
by the Department of Defence to support
interworking of dissimilar computers across a
network. A protocol which provides end-to-end,
connection-oriented, reliable transport layer (layer 4)
functions over IP controlled networks. TCP performs
the following functions: flow control between two
systems, acknowledgements of packets received and
end-to-end sequencing of packets.
Time Domain Reflectometer. Enables you to locate the
position of a fault - short, break, low insulation,
cross-talk, or any impedance mismatch - in the copper
pair being tested. the TDR transmits a pulse down the
line and measures the time it takes to receive the
reflected signal back from the other end of the line, or
from a fault.
Time To Live, sometimes known as hop count, is a
value that is set by the device that sends the Ping
message. The value is decremented by each IP network
router device that the message passes through. When
the value = 0 the IP packet is deleted from the
network. This prevents un-routed packets remaining
in the network any longer than necessary.
Transmission/Transmitted/Transmit.
Unspecified Bit Rate.
L N O P Q R S T U V W X
J K
Glossary & Abbreviations
Y Z
Glossary-11
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