Lucent Technologies Metropolis DMXplore, Installation Manual

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G L O S S A R Y
G L - 1 9
365-372-334 R2.0
Issue 4, November 2004
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CCITT - International Telephone and Telegraph Consultative Committee
An international advisory committee under United Nations’ sponsorship that has
composed and recommended for adoption worldwide standards for international
communications. Recently changed to the International Telecommunications
Union Telecommunications Standards Sector (ITU-TSS).
Channel
A logical signal within a port. For example, for an EC-1 port, there is one STS-1
channel and sometimes 28 VT1.5 channels. See Port.
Channel State Provisioning
A feature that allows a user to suppress reporting of alarms and events during
provisioning by supporting multiple states (automatic, in-service and not
monitored) for VT1.5 and STS-1 channels. See Port State Provisioning.
CV - Coding Violation
A performance monitoring parameter.
CVFE - Coding Violation Far-End
An indication returned to the transmitting terminal that an errored block has been
detected at the receiving terminal.
D DACS III-2000
Digital Access and Cross-Connect System that provides clear channel switching at
either the DS3 or the STS-1 rates, eliminating the need for manual DSXs.
DACS IV-2000
Digital Access and Cross-Connect System that provides electronic DS3/STS-1 or
DS1/VT1.5 cross-connect capability, eliminating the need for manual DSXs.
DCC - Data Communications Channel
The embedded overhead communications channel in the SONET line. It is used for
end-to-end communications and maintenance. It carries alarm, control, and status
information between network elements in a SONET network.
DCE - Data Communications Equipment
In a data station, the equipment that provides the signal conversion and coding
between the data terminal equipment (DTE) and the line. The DCE may be separate
equipment or an integral part of the DTE or of intermediate equipment. A DCE
may perform other functions usually performed at the network end of the line.
DDM-2000
Lucent’s first generation SONET multiplexers that multiplex DS1, DS3, or EC-1
inputs into EC-1, OC-1, OC-3, or OC-12 outputs.