Status
The indication of a short-term change in the system.
Stratum 3 Timing Generator
The timing generator circuit pack, located in the OC-48 r OC-192 high-speed OLIU circuit
pack, generates clock signals for distribution to the transmit circuits. It operates in the
free-running, loop-timing, phase-lock, and holdover modes.
STS, STS-n
Synchronous Transport Signal
STS, STS-n - Synchronous Transport Signal
The basic building block signal with a rate of 51.840 Mb/s for an STS-1 signal and a rate of n
times 51.840 Mb/s for an STS-n signal.
STS-1 SPE
STS-1 Synchronous Payload Envelope
STS-1 SPE - STS-1 Synchronous Payload Envelope
A 125-microsecond frame structure composed of STS path overhead and the STS-1 payload.
STS-3c
Synchronous Transport Level 3 Concatenated Signal
STS-3c
Synchronous Transport Level 3 Concatenated Signal. See OC-3c.
STU
Synchronized - Traceability Unknown
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.
Superframe Format (SF)
A DS1 framing format in which 24 DS0 timeslots plus a coded framing bit are are organized
into a frame which is repeated 12 times to form the superframe.
Synchronization Messaging
SONET synchronization messaging is used to communicate the quality of network timing,
internal timing status, and timing states throughout a subnetwork.
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G L O S S A R Y
G L - 2 4
Lucent Technologies
365-372-333 R2.1
Issue 4, June 2005
