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transmits data at a very rapid speed.
LAPD (Link Access Procedure D-bytes)
Protocol used on Data Link Layer (OSI layer two) according to ITU-T Q.921.
LBO (Lightguide Build-Out )
An attenuating (signal-reducing) element used to keep an optical output signal strength
within desired limits.
LCS
Local Customer Support
LED
Light-Emitting Diode
LH
Long Haul
Line Timing
Refers to a network element that derives its timing from an incoming STM-N signal.
Location
An identifier for a specific circuit pack, interface module, interface port, or
communications link.
LOS (Loss of Signal)
The complete absence of an incoming signal.
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M
Maintenance Condition
An equipment state in which some normal service functions are suspended, either
because of a problem or to perform special functions (copy memory) that cannot be
performed while normal service is being provided.
MB
Megabytes
Mbit/s
Megabits per second
MDI
Miscellaneous Discrete Input
MDO
Miscellaneous Discrete Output
MM
Multi Mode
Glossary
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GL-6
Lucent Technologies - Proprietary
See notice on first page
365-374-187
Issue 1, December 2005