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Term
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Description
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OC-12
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Optical Carrier 12 (OC-12). The optical carrier level equivalent
to SONET STS-12 at 622.08 Mbps.
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OC-3
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SONET Optical Carrier, running at 155 Mbps. It is equivalent
to SDH STM-1 in Europe.
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OEM
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Original Equipment Manufacturer. A manufacturer of products
for integration in other products or systems.
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OFDM
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Orthogonal Frequency Division Multiplexing
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OFDM
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Orthogonal Frequency Division Multiplexing. Single high-frequency
carrier is replaced by multiple subcarriers, each operating
at a significantly lower frequency. It is a special method
of multi-carrier modulation. Like all wireless transmission
schemes, OFDM encodes data onto a radio frequency (RF) signal.
OFDM transmits multiple high data rate signals concurrently
on different frequencies. The channel spectrum is passed into
a number of independent non-selective frequency sub-channels
and these subchannels are used for one transmission link between
the access point and mobile terminals.
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Office Printer
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A printer which is designed for general purpose office use,
and may be used by an individual user, or shared by a small
group of users.
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One Dimension
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A one dimension is composed of a single array of element
N in size.
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Online gaming
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Interactive electronic game playing with offsite, independent
variables such as another human opponent or an offsite PC.
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Online Services
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Online Services are commercial networks providing information
in a certain structure to their customers. They also offer
communication tools like E-Mail, Chat-Lines a.s.o. The most
popular commercial Online Services are America Online, CompuServe
and Microsoft Network.
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Optical Carrier (OC-n)
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Fundamental unit in the SONET (Synchronous Optical Network)
hierarchy. OC indicates an optical signal; n represents increments
of 51.84 Mbps. Thus, OC-1, -3, and -12 equal optical signals
of 51, 155, and 622 Mbps.
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Optimize
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The process of decreasing a designs area and/or increasing
its performance.
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OSGi
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The Open Services Gateway Initiative (OSGi) is an industry
group working to define and promote an open standard for connecting
the coming generation of smart consumer and small business
appliances with commercial Internet services. For more information
please visit: www.osgi.org.
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OSI
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OSI Reference Model. The seven-layer network architecture
model of data communication protocols developed by ISO and
CCITT to facilitate interconnection of disparate computer
networks. Each layer specifies particular network functions
such as addressing, flow control, error control, encapsulation,
and reliable message transfer.
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Outline Font
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A font in which each character is represented by sets of
equations or vectors which define the outline of the character.
An outline font cannot be printed "as is", but must first
be scaled to the appropriate size, and "filled" with dots
to make a bitmap. As outline fonts can be scaled they may
be used to create characters of any size, and may be rotated
to any angle.
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