GLOSSARY GLOSSARY
Ed. 046/8 Réf. 3EH 21000 BSAA
neral-purpose resource keys (RSB).
PAP
"Password Authentication Procedure". Procedure used by PPP servers to validate connection re-
quests.
PASSWORD
Code acting as a password, controlling access to the voice mail unit and the terminal locking func-
tion.
PAT
"Port Address Translation".
PCBT
"PC Based Telephony".
PE
"Public Exchange".
PLEASE WAIT MESSAGE
An audio component of the system (or an external device, such as a cassette player) which plays a
message or piece of music while keeping an external correspondent on hold.
POP3
"Post Office Protocol". Standard Internet protocol for receiving electronic messages. POP3 is a
client/server protocol in which the messages are received and hosted by the ISP. When a message
is read, it is transferred to the client terminal and is no longer hosted by the ISP.
PPP
"Point-to-Point Protocol". Protocol used in communication between two computers using a serial in-
terface (typically a PC connected to a server via a telephone line).
PRA
"Primary Rate Access". Board for connecting a T2 digital primary access; the access supports 48
kbps structured as 30 B-channels at 64 kbps for voice and data transmission, and 1 D-channel at
64 kbps for signaling.
PROXY
A proxy server is used as an interface between a user and the external Internet network.
PSTN
"Public Switched Telephone Network".
PTN(X)
"Private Telecommunications Network (eXchange)". A private network consisting of switches and ter-
minals connected together by telephone links.
Q
QOS
"Quality Of Service". Network characteristics (transmission speed, etc.) can be measured, improved
and, to an extent, guaranteed in advance.
QSIG
"Q Signaling Protocol". Set of standard signaling protocols between the private PBXs of a telephone
network (Q reference point) interconnected by digital ATLs.
R
RADIUS
"Remote Authentication Dial-In User Service". A client/server protocol that enables remote access
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