Verilink AS2000: The Basics (880-502981-001) Product Manual - Manual (Page 153)

Acronyms and Definitions
Verilink Access System 2000: Basics Glossary-33
M
M1-3 An asynchronous framing format
that uses all 21 DS3 C-bits for bit
stuffing. The standard M1-3
format cannot provide end-to-end
parity information.
Management Information Base (MIB) The information that SNMP can
access, structured as a hierarchy.
In common usage, MIB is in
reference to a sub-branch of the
entire MIB.
M-bit M-bits (multiframing bits) form the
DS3 multiframe alignment signal.
There are three M-bits per DS3
frame. The M-bits are located in
the first bit position in block 1 of
subframes 5, 6, and 7. DS3
equipment use the M-bit “010”
pattern to locate the seven
subframes.
Mbit/s Megabits per second: a
measurement of data transmission
speed equaling one million binary
digits transmitted or received
through a medium every (one)
second.
Megahertz Megahertz means “million hertz”
or “million cycles per second.”
MHz See Megahertz .
MIB See Management Information
Base (MIB) .
microsecond ( µ s) One millionth of a second.
MLS See Multi-line Shelf .
multiframe An E1 frame alignment pattern in
which 16 consecutive E1 frames
are grouped together.
Multi-line Shelf A shelf unit that houses the three
data buses (A, B, & C), 13 (or
fewer) AS2000 application
modules and two power supplies.
multiplexer (mux) A multiplexer combines one or
more lower bandwidth lines into a
higher bandwidth line. For
example, 28 T1’s are multiplexed
to form a T3 line.
mux See multiplexer (mux) .