Alcatel-Lucent 1665 Installation Manual page 422

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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.
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M
Main
The two slots (M-1 and M-2) on the Alcatel-Lucent 1665 DMX shelf in which the OC-48 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.
Multiplexing
The process of combining several distinct digital signals into a single composite digital signal.
Mult - Multipling
The cascading of signals in a bay. In the MULT mode, the DS1 external reference can be cascaded
to other shelves in a bay using Mult cables. Normally starting with the bottom shelf (Number 1) and
working towards the top of the bay.
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N
NE - Near End
The network element the user is at or working on. Also called local.
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GL - 2 2
Terms and definitions
365-372-304R7.1
Issue 2 March 2008