Lucent Technologies LambdaUnite Installation Manual page 355

TDM (Time Division Multiplexing)
A technique for transmitting a number of separate data, voice, and/or video signals
simultaneously over one communications medium by interleaving a portion of each signal one
after another.
TEN
Telecommunications Management Network
Through (or Continue) Cross-Connection
A cross-connection within a ring, where the input and output tributaries have the same tributary
number but are in lines opposite each other.
Through Timing
Refers to a network element that derives its transmit timing in the east direction from a received
line signal in the east direction and its transmit timing in the west direction from a received line
signal in the west direction.
THz
Terahertz (10
TI
Timing Interface
TID (Target Identifier)
A provisionable parameter that is used to identify a particular Network Element within a
network. It is a character string of up 20 characters where the characters are letters, digits, or
hyphens (-).
TL1 (Transaction Language One)
A subset of ITU's human-machine language.
TM (Terminal Multiplexer)
An Add/Drop Multiplexer with only one stream interface.
Transmit-Direction
The direction outwards from the Network Element.
Tributary
A signal of a specific rate (2 Mbit/s, 34 Mbit/s, 140 Mbit/s, VC12, VC3, VC4, STM-1 or
STM-4) that may be added to or dropped from a line signal.
Tributary
A path-level unit of bandwidth within a port, or the constituent signal(s) being carried in this
unit of bandwidth, for example, an STM-1 tributary within an STM-N port.
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365-374-059
Issue a, January 2002
12
Hz)
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