Lucent Technologies LambdaUnite Installation Manual page 353

SSM
Synchronization Status Marker
SSU_L
Synchronization Supply Unit — Local
SSU_T
Synchronization Supply Unit — Transit
Standby Path
One of two signals entering a constituent path selector, the standby path is the path not
currently being selected.
State
The state of a circuit pack indicates whether it is defective or normal (ready for normal use).
Station Clock Input
An external clock may be connected to a Station Clock Input.
Status
The indication of a short-term change in the system.
STBY (Standby)
The circuit pack is in service but is not providing service functions. It is ready to be used to
replace a similar circuit pack either by protection or by duplex switching.
STM
Synchronous Transport Module (SDH)
STM-N (Synchronous Transport Module, Level N)
A building block information structure that supports SDH section layer connections, where N
represents a multiple of 155.52 Mbit/s. Normally N = 1, 4, 16, 64 or 256.
STP
Shielded Twisted Pair
Stream (Line; aggregate)
A synchronous high rate connection between multiplexers, typically 10 or 40 Gbit/s.
STS
Synchronous Transport Signal (SONET)
Subnetwork
A group of interconnected/interrelated Network Elements. The most common connotation is a
synchronous network in which the Network Elements have data communications channel (DCC)
connectivity.
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Issue a, January 2002
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