Verilink Access Manager 2000 (896-502037-001) Product Manual - Manual (Page 345)

Access Manager 2000 Manual A-13
M
Master NCC 2020 This module provides the operator interface between an Access
Manager 2000 controller, ASCII terminal, or NCC front panel
thumbwheel switch and an NCC, TAC, or DIU in an Access System
2000 node. When multiple nodes are present, each node has one master
NCC which is linked through a RS-232D daisy chain to all other master
NCCs for Access Manager 2000 operator interface over a single line.
The Master NCC occupies the first slot of Shelf 1 in each system node.
Mbps See Megabits per second.
Megabits per Second A measure of data transfer 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.
MLS See Multiline Shelf.
Modem Modulator / Demodulator; an electronic device that enables digital data
to be sent across the network.
Multiline Shelf A multiline shelf (MLS) is a component of the Access System 2000
which is used to house 13 (or less) plug-in modules such as NCCs,
TACs, TIUs, and DIUs. The MLS also provides three buses and several
input and output jacks for module interconnection and usability.
The MLS 2200 shelf provide the same module capacity, as well as,
providing 7 Data Buses.
Multiplex A combination of information channels onto a single transmission
bearer.
Multiplexer A multiplexer takes several lower speed lines (channels) and combines
them into one faster line (channel).
Mux See Multiplexer.
Term Definition