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Glossary
See PVP.
permanent virtual
path
A physical connection to a computer through which data flows. An Ethernet port, for example, is the
physical port
point at which the Ethernet network cabling plugs into a computer.
See POTS.
plain old telephone
service
See PPP.
Point-to-Point
Protocol
An interface on an internetworking device (such as a DSLAM).
port
plain old telephone service. General term referring to the variety of telephone networks and services
POTS
in place worldwide.
A device that enables both a DSL data device and a standard analog device to share the same ADSL
POTS splitter
or IDSL line.
See PEM.
power entry module
Point-to-Point Protocol. The successor to SLIP that provides router-to-router and host-to-network
PPP
connections over both synchronous and asynchronous circuits. See SLIP.
A formal description of messages to be exchanged and rules to be followed so that two or more
protocol
systems can exchange information.
See PAM.
pulse amplitude
modulation
permanent virtual circuit (or connection). A virtual circuit that is permanently established. PVCs save
PVC
bandwidth associated with circuit establishment and tear down in situations where certain virtual
circuits must exist all the time. Compare with SVC. See also virtual circuit.
permanent virtual path. A virtual path that consists of PVCs. See also PVC and virtual path.
PVP
Q
quality of service. A measure of performance for a transmission system that reflects its transmission
QoS
quality and service availability.
See 4xflexi.
quad-port flexi
ATU-C line card
See 4xSDSL.
quad-port STU-C
line card
See QoS.
quality of service
Cisco 6260 Hardware Installation Guide
GL-22
OL-2365-02
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