Muratec MFX-3550 User Manual page 210

Glossary
MH
Modified Huffman (MH) is a compression method for decreasing the amount of data that needs to
be transmitted between the fax machines to transfer the image recommended by ITU-T T.4. MH is
a codebook-based run-length encoding scheme optimized to efficiently compress white space. As
most faxes consist mostly of white space, this minimizes the transmission time of most faxes.
MMR
Modified Modified READ (MMR) is a compression method recommended by ITU-T T.6.
Modem
A device that modulates a carrier signal to encode digital information, and also demodulates such
a carrier signal to decode transmitted information.
MR
Modified Read (MR) is a compression method recommended by ITU-T T.4. MR encodes the first
scanned line using MH. The next line is compared to the first, the differences determined, and then
the differences are encoded and transmitted.
NetWare
A network operating system developed by Novell, Inc. It initially used cooperative multitasking to
run various services on a PC, and the network protocols were based on the archetypal Xerox XNS
stack. Today NetWare supports TCP/IP as well as IPX/SPX.
OPC
Organic Photo Conductor (OPC) is a mechanism that makes a virtual image for print using a laser
beam emitted from a laser printer, and it is usually green or gray colored and a cylinder shaped.
An exposing unit of a drum is slowly worn away by its usage of the printer, and it should be
replaced appropriately since it gets scratches from grits of a paper.
Originals
The first example of something, such as a document, photograph or text, etc, which is copied,
reproduced or translated to produce others, but which is not itself copied or derived from
something else.
OSI
Open Systems Interconnection (OSI) is a model developed by the International Organization for
Standardization (ISO) for communications. OSI offers a standard, modular approach to network
design that divides the required set of complex functions into manageable, self-contained,
functional layers. The layers are, from top to bottom, Application, Presentation, Session,
Transport, Network, Data Link and Physical.
PABX
A private automatic branch exchange (PABX) is an automatic telephone switching system within a
private enterprise.
PCL
Printer Command Language (PCL) is a Page Description Language (PDL) developed by HP as a
printer protocol and has become an industry standard. Originally developed for early inkjet
printers, PCL has been released in varying levels for thermal, matrix printer, and page printers.
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