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
TABS
Telemetry Asynchronous Byte Serial (Protocol).
TARP
Target ID Address Resolution Protocol. This protocol enables multi-vendor OI
(operations interworking).
Summary of Contents for DDM-2000 OC-3
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