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AuroraPresto - User Guide
R
RAI
RAS
RDI
RS232
Rx
S
Signalling
(ATM)
Src
Stop bits
SVC
A B C D E F G H I
Glossary-10
Remote Alarm Indication - an error received from a
piece of equipment that is receiving data to indicate
that it is receiving a fault condition, for example LOS
or LOF.
Remote Access Server.
Remote Defect Indication - an error received from a
piece of equipment that is receiving data to indicate
that an RAI has been received for longer than a preset
time.
A standard type of serial connector.
Receiver/Receive/Received.
The procedures used to establish connections on a
ATM network. Signalling standards are based on the
ITU's Q.93B recommendation.
Source Address.
The last bits set in asynchronous transmission, to
indicate that the message is complete. In asynchronous
serial data transmission, each character is sent
between a start bit and one or more stop bits. At the
end of each character the line goes into an idle state,
known as marking. At the start of the next character it
activates again - the active state is known as spacing.
There is a minimum of 1, 1.5 or 2 stop bits between
characters, but the line may remain idle until the next
character is sent.
Switched Virtual Circuit. This a temporary route or
link which can be set up and cleared down on a call by
call basis. The user defines the endpoints when the call
is started.
L N O P Q R S T U V W X
J K
Y Z
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