Zhone Technologies IMACS-200 - Manual (Page 275)

Glossary -1
Glossary
This Appendix lists the glossary of terms used in the telecommunications industry today.
AAL
ATM Adaption Layer
ABCD bits
The bits that carry signaling information over a T1 or E1 line.
ABR
Available Bit Rate
ACAMI
Alternate Channel AMI, transmitting data on every other DS0 in a DS1 to ensure ones-density.
ACO
Alarm Cutoff
ACS
Advanced Communications Server
ADPCM
Adaptive Differential Pulse Code Modulation
ADPCM port
A resource port used to compress voice or subrate data on a DS0.
ADSL
Asymmetric Digital Subscriber Line
aggregate
A single bitstream combining many bitstreams of lower rates.