Verilink AS2000: The Basics (880-502981-001) Product Manual User Manual
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Acronyms and Definitions
Glossary-38
Verilink Access System 2000: Basics
PING command
Packet internet network groper
(PING). A subset of TCP/IP used to
verify the path to an IP active
device. PING verifies valid network
connections.
PLB
See
.
PLB-BOP
A
payload loopback
bit-oriented
protocol A message sent to the far
end through the FDL to put up a
payload loopback at the far end.
point-to-point
A term used to describe a circuit
that interconnects two points
directly.
polarity
Any condition where there are two
opposing voltage levels or
charges, such as positive and
negative.
port
A point of access into a computer
network or other electronic device.
power supply
The device which converts AC to
DC or DC to a different DC voltage
for use by electrical equipment.
ppm
Parts per million—a measure of
unique units present in a group of
one million units.
PRI
Primary Rate Interface, a T1-
based ISDN circuit.
primary synchronization
The primary source for clock
synchronization of the node. Can
be either internal, external,
network port, or DTE/equipment
port signal.
private branch exchange (PBX)
A telephone switch located at the
customer premises that
establishes circuits between
individual lines within the building
and also to the public switched
telephone network.
privileged password
An ACSII terminal password that
can perform all network
management functions.
PRM
Performance response message,
defined in the ANSI T1.403
specification.
PRM C/R Bit
Performance response message
command/response as defined in
the ANSI T1.403 speck.
probe
In frame relay networks, a device
used to monitor the actual frame
relay network usage in order to
imporve management of frame
relay Service Level Agreements.