SMC Networks VDSL2 - Manual (Page 87)

G
LOSSARY
Glossary-5
Media Access Control (MAC)
A portion of the networking protocol that governs access to the
transmission medium, facilitating the exchange of data between network
nodes.
Modal Bandwidth
Bandwidth for multimode fiber is referred to as modal bandwidth because
it varies with the modal field (or core diameter) of the fiber. Modal
bandwidth is specified in units of MHz per km, which indicates the
amount of bandwidth supported by the fiber for a one km distance.
MTU
Multiple Tenant Units
Plain Old Telephone Service (POTS)
One of the services using voice band. Sometimes used as a descriptor for
all voice band services.
Private Branch Exchange (PBX)
A telephone exchange local to a particular organization who use, rather
than provide, telephone services.
RJ-45 Connector
A connector for twisted-pair wiring.
Splitter
A filter to separate DSL signals from POTS signals to prevent mutual
interference.
Switched Ports
Ports that are on separate collision domains or LAN segments.