Alcatel-Lucent 1665 Installation Manual page 357

Terms and definitions
............................................................................................................................................................................................................................................................
............................................................................................................................................................................................................................................................
L
LBO - Line Build Out
An equalizer network between the Alcatel-Lucent 1665 DMXtend and the DSX panel. It guarantees
the proper signal level and shape at the DSX panel.
LED - Light Emitting Diode
Used on a circuit pack faceplate to show failure (red) or service state. It is also used to show the
alarm and status condition of the system.
Line Timing
The capability to directly derive clock timing from an incoming OC-N signal while providing
theuser the capability to provision whether switching to an alternate OC-N from a different source
(as opposed to entering holdover) will occur if the OC-N currently used as the timing reference for
that NE becomes unsuitable as a reference. For example, intermediate nodes in a linear network are
line timed. See Loop Timing.
Local
See Near-End.
Locked Cross-Connection
This is a variation of the ring cross-connection that allows the user to lock the path selector to a
specified rotation of the ring. Any signal received from the other rotation of the ring is ignored.
LOF - Loss of Frame
A failure to synchronize to an incoming signal.
Loop Timing
Loop timing is a special case of line timing. It applies to NEs that have only one OC-N interface.
For example, terminating nodes in a linear network are loop timed. See Line Timing.
LOP - Loss of Pointer
A failure to extract good data from an STS-1 payload.
LOS - Loss of Signal
The complete absence of an incoming signal.
LR - Long Reach
A term used to describe distances of 40 km or more between optical transmitter and reciever without
regeneration. See Intermediate Reach.
............................................................................................................................................................................................................................................................
M
Main
The two slots (M-1 and M-2) on the Alcatel-Lucent 1665 DMXtend shelf in which the OC-3 or OC-
12 main OLIU circuit packs are installed.
Midspan Meet
The capability to interface between two lightwave terminals of different vendors. This applies to
high-speed optical interfaces.
............................................................................................................................................................................................................................................................
Alcatel-Lucent 1665 DMXtend R10.0
365-372-327R10.0 Issue 1
January 2013
G L- 2 1