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44 G
LOSSARY
MAC
Media Access Control. A protocol that defines the way workstations
gain access to transmission media, most widely used in reference to
LANs. For IEEE LANs, the MAC layer is the lower sublayer of the data
link layer protocol.
MAC address
An address used by the MAC data link sublayer protocol.
Mbaud
Megabaud
Mbps
Megabits per second.
MiniDIN
A connector which connects the VCN AC to the Local Management
Interface.
NA
Not Applicable. Wherever this appears, it means that the specified
condition is irrelevant for the case mentioned.
NAT
Network Address Translation. The process of converting between IP
addresses used within an Intranet or other private network and Internet
IP addresses. This approach makes it possible to use a large number of
addresses within the local Intranet without depleting the limited
number of available numeric Internet IP addresses.
NAU
Network Access Unit. In this case it is the unit installed in a room which
enables both voice and high speed data services simultaneously on the
existing telephone line. Another name for the VCN AP.
NCU
Network Concentration Unit. Another name for the VCN AC.
NSP
Network Service Provider
POTS
Plain Old Telephone Service. Basic dial telephone connections to the
public switched network, without any added features or functions.
Vac
Volts Alternating Current. The measure of the peak-to-peak voltage
swing of an electrical signal.
VCN
Visitor and Community Network. The system that deploys the VCN
Access Concentrator and the VCN Access point(s).
VCN AC
VCN Access Concentrator, formerly called NCU.
VCN AP
VCN Access Point, formerly called NAU.
Vdc
Voltage of direct current.