Panasonic FP-D250 User Manual page 614

ROM (Read Only Memory) Nonevolatile memory that can be read but not changed.
Router Network interconnector device operating at OSI Network Layer (Level Three)
that supports a particular Network Layer protocol and related stack, such as TCP/IP,
DecNet, XNS, SNA, OSI IP, IPX. These days routers tend to support multiple protocols
by a variety of methods, such as Protocol Independent Routing. A router can be
used to link LANs together locally or remotely as part of a WAN. A network built
using routers is often termed an internetwork.
Routing Process of delivering a message across one or more networks via the most
appropriate path.
RS232-C An EIA standard which is the most common way of linking data devices
together. An interface for linking DCEs and DTES, it defines the electrical
characteristics of the signals from such devices. RS232 is suitable for both
synchronous and asynchronous communications and specifies a 25-pin connector,
traditionally the DB-25. 20 of the pins carry out routine system operation while the
rest are reserved for modem testing or unallocated. For this reason it is never safe to
assume that two RS232 devices will work together. Newer, more compact RS232
interfaces have nine pins only and an adapter card is needed. It is functionally similar
to the ITU-TS's V.24 and V.28 standards.
RS422 EIA recommended standard to extend the RS232 50ft limit. It is most commonly
implemented on 25-pin connectors (DB-25s) and is electrically compatible with the
ITU-TS V.11 standard.
RS423 The EIA recommended standard for cable lengths that extend the RS232
50ft limit. It was introduced in tandem with RS422 but is not widely used. Electrically
compatible with the ITU-TS's V.10 Recommendation.
S
Scan Head The part of the mechanism of the scanner that optically senses the text
or graphic as it moves across the page.
Scan Rate Number, measured in times per second, a scanner samples an image.
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