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B • Glossary
Model 6676 6U CPCI Chassis Assembly User Guide
44
N
N
N+1 Redundant
An environment containing more than two power
supplies, where the power supplies typically current
share, with fault tolerance such that one power sup-
ply may fail and the system will continue to operate.
NEBS
Network Equipment Building Standards—Defines a
rigid and extensive set of performance, quality, envi-
ronmental and safety requirements developed by
Bellcore, the R&D and standards organization
owned by the seven regional Bell operating compa-
nies (RBOC’s).
P
PCI
Peripheral Component Interconnect. A specification
for defining between logic components. Typically
used for interconnecting high-speed, PC-compatible
chipset components. The PCI specification is issued
through the PCI Special Interest Group (PCI SIG).
PCI SIG
Peripheral Component Interconnect Special Interest
Group
PICMG
PCI Industrial Computers Manufacturers Group—a
consortium of industrial computer product vendors
who develop specifications for PCI-based systems
and boards for use in industrial computing applica-
tions.
Platform
Describes the system environment, including the
backplane and related enclosure.
S
SELV
Safety Extra Low Voltage—a term generally defined
by the regulatory agencies as the highest voltage that
can be contacted by a person and not cause injury. It
is often specifically defined as 30 VAC or 42.4 VDC.
S-HAZ
Secondary Hazardous—any voltage within a system
that is greater than 60VDC (42.4VAC-peak), NOT
meeting the requirements for a LIMITED CUR-
RENT CIRCUIT, or for a TNV CIRCUIT. Typical
ringing voltage is considered SECONDARY HAZ-
ARDOUS unless it is current limited. Raw ringing is
considered SECONDARY HAZARDOUS. (Refer
to IEC950 or PICMG 2.5 R1.0 CompactPCI‚ Com-
puter Telephony Specification for information.)
Shroud
A male connector body designed to fit over the
extended tails of a long tail connector which allows a
female connector to be mated from the rear side for
midplane or rear I/O applications.
T
TDM
Time Division Multiplex—A technique for transmit-
ting a number of separate data, voice and/or video
signals simultaneously over one communications
medium by quickly interleaving a piece of each signal
one after another.
TNV
Telephone Network Voltages—any voltage present
on the telephone network side of the isolation device
on any device (for example, board) that connects to
the telephone network.
Summary of Contents for ForeFront 6676
Page 6: ...Contents Model 6676 6U CPCI Chassis Assembly User Guide 6...
Page 8: ...Model 6676 6U CPCI Chassis Assembly User Guide 6...
Page 12: ...About this guide Model 6676 6U CPCI Chassis Assembly User Guide 10...
Page 14: ...1 Introduction Model 6676 6U CPCI Chassis Assembly User Guide 12...
Page 28: ...2 Installation checklist Model 6676 6U CPCI Chassis Assembly User Guide 26...
Page 34: ...3 Maintenance Model 6676 6U CPCI Chassis Assembly User Guide 32...
Page 36: ...3 Maintenance Model 6676 6U CPCI Chassis Assembly User Guide 34 Troubleshooting...
Page 38: ...4 Contacting Patton for assistance Model 6676 6U CPCI Chassis Assembly User Guide 36...
Page 44: ...B Glossary Model 6676 6U CPCI Chassis Assembly User Guide 42...
Page 48: ...B Glossary Model 6676 6U CPCI Chassis Assembly User Guide 46 W...
Page 49: ...47 Appendix C Bibliography Chapter contents Publications referenced in this guide 48...