MERLIN LEGEND Communications System Release 6.1
System Programming Guide
555-661-111
Issue 1
August 1998
Glossary
Page GL-23
R
S
RAM (random-access memory) Computer memory in which an
individual
byte
or range of bytes can be addressed and
read or changed without affecting other parts of memory.
read-only memory See
ROM
.
Remote Access System feature that allows an outside caller to gain access
to the system, almost as if at a system extension. In a
private network
, remote access settings are used to control
calls routed via
ARS
or
UDP
routing across the network.
restore Procedure whereby saved and archived system
programming is reinstated on the system, from a floppy
disk or
memory card
. See also
backup
.
restricted data
channel
Restricted data channels do not allow the transmission of
occurrences of more than seven contiguous zero bits. See
also unrestricted data channel.
ring generator Circuit pack added to the power supply that generates a
high-voltage, 20–30 Hz signal to ring a telephone.
riser cable Cable that runs between floors in a multistory building and
connects wiring closets.
RS-232 Physical interface, specified by the Electronics Industries
Association (EIA), that transmits and receives
asynchronous data at distances of up to 50 feet (15 m).
robbed-bit
signaling
Signaling in which the least significant
bit
of every sixth
frame per channel is used for signaling in that channel.
ROM (read-only memory) Computer memory that can be read
but cannot be changed.
SAA (Supplemental Alert Adapter) Device that permits alerting
equipment to be connected to an analog multiline
telephone jack so that people working in noisy or remote
areas of a building can be alerted to incoming calls.
SA buttons Telephone buttons that provide access to both inside and
outside calls.
satellite system In a
private network,
a
communications system
that is
directly connected to and located within 200 miles of the
local system.
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