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MERLIN LEGEND Communications System Release 6.0
System Manager’s Guide
555-660-118
Issue 1
February 1998
About the System
Page 2-27Auxiliary Components
2
■ Accessories. Different kinds of accessories can be added to the system to
provide more power or additional protection from power surges. There are
three types of accessories:
— Power Accessories. For example, an Uninterruptible Power Supply
(UPS) for the system or telephone power units to provide additional
power to individual telephones that require them for adjuncts.
— Protection Accessories. For example, for grounding and protecting
special telephone connections (like a telephone located in a different
building) from lightning strikes and power surges.
— Miscellaneous Accessories. A power-failure transfer (PFT) telephone
used to make and receive calls in the event of a commercial power
failure or an Off-Premises Range Extender (OPRE) used for a single-
line telephone located in a different building from the control unit and
more than 1000 feet away.
Figure 2–10
illustrates some of these components. For information about these
accessories, see Chapter 3, “System Components,” and the
Equipment and
Operations Reference
(not updated since Release 3.0).