Glossary
B-2 Centillion 1200N ATM Switch User Manual
NTP 297-8103-903
AAL-5
ATM Adaptation Layer Type 5: AAL functi ons in support of variable bit rate, delay -
tolerant connection-oriented data traffic requiring minimal sequencing or error
detection support.
AALP
Audible Alarm Panel
ABR
Available Bit Rate: ABR is an ATM layer service category for which the limiting
ATM layer transfer characteristics provid ed by the network may change subsequent
to connection establishment. A flow control mechanism is specified which supports
several types of feedback to control the source rate in response to changing ATM
layer transfer characteristics. It is expected that an end-system that adapts it s traffic
in accordance with the feedback will experience a low cell loss ratio and obtain a
fair share of the available bandwidth according to a network specific allocation
policy. Cell delay variation is not controlled in thi s service, although a dmitted cells
are not delayed unnecessarily.
AC
Alternating Current
ACH
Act Change
ACI
Active Cell Indication
ACK
Acknowledgmen
ACM
Address Complete Message: A BISUP call control message from the receiving
exchange to sending exchange indicating the completion of address information.