363-206-204
GLOSSARY
Issue 9 October 1998
GL-19
Standby
Standby identifies a 1+1 protected OC-n line which is not currently selected by the
receiver at either end as the payload carrying signal, or a 1x1 or 1xn protected cir-
cuit pack that is not currently carrying service. (See Active.)
Status
The indication of a short-term change in the system.
STS, STS-n
Synchronous Transport Signal — The basic logical 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
The basic logical building block signal with a rate of 51.840 Mb/s.
STS-3c
Synchronous Transport Level 3 concatenated Signal. See OC-3c.
Subnetwork
A subnetwork consists of a CO (or Gateway Network Element), DDM-2000, and
all remote DDM-2000s connected via SONET DCC that are enabled.
Synchronization Messaging
SONET synchronization messaging is used to output DS1 AIS when clock trace-
ability is lost.
SYSCTL
The system controller circuit pack that provides overall administrative control of
the terminal.
T
T1X1 and T1M1
The ANSI committees responsible for telecommunications standards.
TA
Bellcore Technical Advisory
TA BS
Telemetry Asynchronous Byte Serial (Protocol).
TA RP
Target ID Address Resolution Protocol. This protocol enables multi-vendor OI
(operations interworking).
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