Table of Contents
Advertisement
Glossary
AAL
AAL1
AAL5
ACT
ADSL
AIS
AR
ASAM
Speed Touch 591s Technical Practices
February 2001
90-8785-01
ATM adaptation layer
A layer that sits above the ATM layer and adapts non-ATM bit streams into
ATM cells.
ATM adaptation layer - type 1
AAL1 is a specific type of ATM adaptation intended for constant bit rate
service applications.
ATM adaptation layer - type 5
absolute congestion threshold
ACT is a frame relay parameter related to the buffer capacity of a frame relay
device. At the ACT, the frame relay device discards all newly arriving
frames and raises a congestion alarm. See also MCT and SCT.
asymmetric digital subscriber line
alarm indication signal
An AIS is a code sent downstream in a digital network to indicate that a
traffic-related defect has been detected. It is also known as an RAI or yellow
alarm.
access rate
The effective maximum bandwidth of a frame relay port
ATM subscriber access multiplexer
GL-1
Advertisement
Table of Contents
