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MMA
maintenance association
MAC
See “media access control” (p. GL-16) for definition.
management information base (MIB)
A formal description of a set of network objects that can be managed using the Simple Network
Management Protocol (SNMP). The information is represented in a tree format.
margin
The allowance for attenuation in addition to that explicitly accounted for in system design.
master controller (MC)
The system's master controller (MC) card.
MC
See “master controller” (p. GL-16) for definition.
MD
maintenance domain
mean time between failures (MTBF)
The expected average time between failures usually expressed in hours.
mean time to repair (MTTR)
The average time that it takes until a failure is repaired. MTTR is usually expressed in hours.
media access control (MAC)
The MAC address is a computer's unique hardware number. The MAC address is used by the
media access control sublayer of the data link layer of telecommunications protocols.
MEP
maintenance end point
mesh
A type of network configuration that combines ROADMs to support mesh channel connectivity
between the ROADMs without O-E-O for transmission. It is operated as a single NE with as
many as four degrees (bidirectional DWDM interfaces) that comprise two lines for the east and
two for the west.
MIB
See “management information base” (p. GL-16) for definition.
mid-stage access amplifier (MSA)
An MSA has two amplifier stages between which can be fibered a DCM/DCF card or an external
dispersion compensation unit.
Glossary
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GL-16
1830 PSS-36/PSS–32/PSS-16/PSS-4
8DG60888CAAA Release 3.6.0 and 3.6.1
Issue 1 June 2011
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