Glossary & Abbreviations
Issue 7 - 05/02
Glossary-11
J
K
Y
Z
Switching
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.
T
TCP
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.
TDR
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.
TTL
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.
Tx
Transmission/Transmitted/Transmit.
U
UBR
Unspecified Bit Rate.
481801-7.book Page 11 Thursday, May 23, 2002 10:46 AM
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Страница 225: ...481801 Issue 7 05 02 Appendix 1 AuroraPresto Menus 481801 7 book Page 1 Thursday May 23 2002 10 46 AM...
Страница 233: ...481801 Issue 7 05 02 Appendix 2 ADSL Status Messages Vendor Codes 481801 7 book Page 1 Thursday May 23 2002 10 46 AM...
Страница 243: ...Issue 7 05 02 A3 1 Appendix 3 Glossary Abbreviations 481801 7 book Page 1 Thursday May 23 2002 10 46 AM...
Страница 257: ...481801 Issue 7 05 02 Index 481801 7 book Page 1 Thursday May 23 2002 10 46 AM...
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