Carrier Access 1750 Manual De Usuario
Glossary-6
Broadmore 1750 - Release 4.6
Glossary
Glossary of Terms
ATM Adaptation Layer (AAL)
Type 1
AAL functions in support of constant bit rate, time-dependent traffic
such as voice or video (default in CES-CBR configuration).
such as voice or video (default in CES-CBR configuration).
Type 2
AAL undefined by International Standards bodies. Its anticipated use is
for variable bit rate video transmission.
for variable bit rate video transmission.
Type 3/4
AAL functions in support of variable bit rate, delay-tolerant data traffic
requiring some sequencing and/or error detection support. This was
originally two AAL types, i.e., connection-oriented data traffic requiring
minimal sequencing or error detection support.
requiring some sequencing and/or error detection support. This was
originally two AAL types, i.e., connection-oriented data traffic requiring
minimal sequencing or error detection support.
Type 5
AAL functions in support of variable bit rate, delay-tolerant connection-
oriented data traffic requiring minimal sequencing or error detection
support.
oriented data traffic requiring minimal sequencing or error detection
support.
Broadband Bearer Capability
A bearer class field that is part of the initial address message.
BCOB
Broadband Connection Oriented Bearer -- information in the SETUP
message that indicates the type of service requested by the calling user.
message that indicates the type of service requested by the calling user.
BCOB-A
Bearer Class A -- indicated by ATM end user in SETUP message for
connection-oriented, constant bit rate service. The network may perform
internetworking based on AAL information element (default in CES-
CBR configuration).
connection-oriented, constant bit rate service. The network may perform
internetworking based on AAL information element (default in CES-
CBR configuration).
BCOB-C
Bearer Class C -- indicated by ATM end user in SETUP message for
connection-oriented, variable bit rate service. The network may perform
internetworking based on AAL information element.
connection-oriented, variable bit rate service. The network may perform
internetworking based on AAL information element.
BCOB-X
Bearer Class X -- indicated by ATM end user in SETUP message for
ATM transport service where AAL, traffic type, and timing requirements
are transparent to the network.
ATM transport service where AAL, traffic type, and timing requirements
are transparent to the network.