M13 -- Basically a
Multiplexer that combines 28 T1's into a single DS-3 aggregate link.
M13's are channelized
and requires a DCS
to "UN" channelize the DS-1's.
MDF (Main Distribution Frame) --
A mechanical 'frame' in a central office that
carries the millions of wires into and out of a central office. The
central connecting point for cabling. It is also the main location for
testing and cross connecting. The MDF
usually has separate voice and data trunks.
MDSL (Medium-speed Digital
Subscriber Line) - European terminology
describing DSL speeds in the 768Kbps range. Usually single pair with
The bay within a
area, within a telephone company, where the actual wires are connected
for the CAPs (competitive access providers) to have access.
MLT (Mechanized Loop Testing)
-- A type of test use by telephone
companies to test equipment at the customer premises. Basically is it's
a digital loop test where the CO sends data to the
equipment and the CPE equipment returns an acknowledgement.
ML-PPP (MultiLink-Point to
Point Protocol) --
MIB (Management Information
Base) - Definition of protocols which
explains operation and compatibility. A database of managed objects
accessed by network management protocols. An
MIB is a set of parameters, which an
management station can query or set in the SNMP agent of a network
device (e.g. router). In theory, any SNMP manager can talk to any SNMP
agent with a properly defined MIB.
Modem (acronym for
Modulator, DEModulator) -- A device that
modulates and demodulates signals for transmission through a medium,
similar to a radio and radio transmitter. Normally refers to the popular
standard dial-up modems, but may be used in discussion of any similar
devices. Basically, modems do for computers what a telephone does for
humans. xDSL is arguably a type of modem.
MPOE (Main Point of Entry)
-- Telco language for the point of the
premises where the telephone company access point is located.
Multiplexer (MUX) --
Device that combines several low speed lines into a single high-speed
link. Used in pairs. A
DSLAM is a
type of MUX