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GLOSSARYGLOSSARY
Ed. 04 1/8Réf. 3EH 21000 BSAA
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GLOSSARY
A
ACSE
"Association Control Service Element". OSI convention used for establishing, maintaining and re-
leasing connections between two applications.
ADN
Additional Designation Number.
AFU
"Auxiliary Function Unit". Daughter board of the CPU/CPUe board supporting ancillary functions
such as general bell, doorphone, audio in, audio out, etc.
API
"Application Programming Interface".
ARI
"Access Right Identifier". System identification number (DECT feature).
ARS
"Automatic Route Selection". A logic direction is a set of trunks used for a call with the following fa-
cilities: seeking out the optimal path for a call, using the least-cost operator or network; overflow
management: enables a PABX to find a new route to make an outgoing call when there are no re-
sources available in the initial trunk.
ASN-1
"Abstract Syntax Notation 1". OSI language for describing data types independently of processor
structures and technical representations.
ATA
"Analog Trunk Access". Board for connecting analog network lines (switched network).
B
BACKGROUND MUSIC
External device (e.g. radio tuner) that can broadcast music over the loudspeakers of idle terminals;
broadcasting is stopped automatically if there is an incoming call to the terminal or if the user ma-
kes a call.
BACP
"Bandwidth Allocation Control Protocol". Control protocol associated with BAP.
BAP
"Bandwidth Allocation Protocol". PPP protocol that manages bandwidth by allocating it dynamically
between two ports, i.e. between the two extremities of a point-to-point link.
BOD
"Bandwidth On Demand". Service that allocates bandwidth automatically in response to traffic vo-
lume.
BRA
"Basic Rate Access". Board for connecting T0 digital basic accesses; each access supports a data
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