Lucent Technologies LambdaUnite Installation Manual page 356

Tributary Unit Pointer
Indicates the phase alignment of the VC with respect to the TU in which it resides. The pointer
position is fixed with respect to the TU frame.
™
True Wave Optical Fiber
Lucent Technologies' fiber generally called non-zero dispersion-shift fiber, with a controlled
amount of chromatic dispersion designed for amplified systems in the 1550/1310 nm range.
TRY
Technical Requirement
TSA (Time Slot Assignment)
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.
TSI (Time Slot Interchange)
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
rings), and intra-ring TSI (within rings).
TSO
Technical Support Organization
TTP
Trail Termination Point
TU (Tributary Unit)
An information structure which provides adaptation between the lower order path layer and the
higher path layer. Consists of a VC-n plus a tributary unit pointer (TU PTR).
TUG
Tributary Unit Group
Two-Way Point-to-Point Cross-Connection
A two-legged interconnection, that supports two-way transmission, between two and only two
tributaries.
Two-Way Roll
The operation which moves a two-way cross-connection between tributary i and tributary j to a
two-way cross-connection between the same tributary i and a new tributary k with a single user
command.
Tx
Transmit/OUT
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G L O S S A R Y
G L - 4 0
Lucent Technologies 365-374-059
Issue a, January 2002