Definition Of Terms/Acronyms - Advantech B+B SMARTWORX IE-iMcV-E1-Mux/4 User Manual

DEFINITION OF TERMS/ACRONYMS

The following are terms and phrases used within this manual or are found in
documents associated with this equipment.
1+1
The Term "1+1" refers to line protection where identical
information is transmitted on two redundant lines. The Receiver
chooses the "best" line to use based on the BER of the line.
AIS Alarm Indication Signal: Used in E1 signaling, the AIS is a
predetermined bit stream (all ones) that is transmitted
(forwarded) upon the loss of an incoming E1 signal or when the
E1 signal is disrupted.
AN Auto Negotiation: A signaling protocol used by an Ethernet PHY
to determine the characteristics (speed, duplex mode) of its "link
partner" and configure itself automatically
Bit Error Rate: The percentage of bits with errors divided by the
BER
total number of bits that have been transmitted, received or
processed over a one second time period.
CLI Command Line Interface: An interface screen, often DOS-based,
used for system management and diagnostics requiring the user
to type commands rather than use a GUI.
CV Code Violation: An anomaly of a decoded physical-layer signal
stream resulting in coding (signaling) error(s). Noise bursts or
intermittent connections on a link are the usual causes of code
violations; an HDB3 coding error.
DDMI Digital Diagnostic Monitor Interface: A defined serial interface
and data format typically used to access SFP internal information
FFL Fiber Fault Loopback: When the fiber line fails, the Ethernet port
that is being forwarded over the fiber line is forced out of LINK.
Similar to the Fiber Alert function.
GUI Graphical User Interface: Software that provides a visual
interface to enable an end-user to manage and monitor network
devices.
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