Verilink AS2000: The Basics (880-502981-001) Product Manual Instrukcja Użytkownika Pobierz pdf (Strona 158)

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

payload loopback (PLB)

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

ISDN

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.

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