TBD
To Be Determined
TCA
Threshold-Crossing Alert
TCP/IP
Transmission Control Protocol/Internet Protocol
TDC
TARP Data Cache
TDM
Time Division Multiplexing
Telcordia Technologies
Telcordia Technologies (formerly Bellcore) is a well-recognized telecommunications’ standards
organization.
Threshold-Crossing Alert (TCA)
A message type sent from a Network Element that indicates that a certain performance
monitoring parameter has exceeded a specified threshold.
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.
THz
Terrahertz (1012 Hz)
TID
Target Identifier
Time Division Multiplexing (TDM)
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.
Time Slot Assignment (TSA)
A capability that allows any tributary in a ring to be cross-connected to any tributary in any
lower-rate, non-ring interface or to the same-numbered tributary in the opposite side of the ring.
Time Slot Interchange (TSI)
The ability of the user to assign cross-connections between any tributaries of any lines within a
Network Element. Three types of TSI can be defined: Hairpin TSI, Interring TSI (between
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G L O S S A R Y
G L - 2 6
Lucent Technologies
365-372-333 R2.1
Issue 4, June 2005
