Glossary
Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06 July 2008 GL-19
3FE 51892 AAAA TCZZA Edition 01 ONT Product Information Manual
TID Target Identifier
The parameter in a TL1 command that identifies the NE which is the target
for the execution of the command.
TL1 Transaction Language 1
Human-machine language standard for controlling network elements.
TLS Transport Layer Security
TNG Training Document
TNV Telecom Network Voltage
TRU Top Rack Unit
TWP Twisted Pair
Tx Transmit
Tx is in the upstream direction on the optical network terminal (ONT) side
and in the downstream direction on the line termination (LT) side.
UAI User-to-Access Interface
The link between the subscriber and the FTTU.
UART Universal Synchronous Receiver Transmitter
UAS UAS is expanded in two ways:
• Unavailable seconds
A calculation derived by counting the number of seconds that the
interface is unavailable.
• Universal Access Server
UDP User Datagram Protocol
UDS Unit data sheet
UID User Identifier
UL Underwriters Laboratories, Inc.
UNI User-to-Network Interface
UPC Usage Parameter Control
UPS Uninterruptible Power Supply
An FTTU component that provides emergency backup power for lifeline
POTS at a subscriber’s location.
upstream Transmission from the customer location to the network. On the network
termination (NT) side, transmit (Tx) indicates the upstream direction of the
transmission to the network. On the line termination (LT) side, receive (Rx)
indicates the upstream direction of the transmission to the OLT.
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