ACT
Advanced Communication for Training
ACT
Applied Computerized Telephony (HP)
ACT
Air Charge Temperature
ACTA
Americas Carriers Telecommunication Association
3PCC
3rd Party Call Control
AAL
Asynchronous transfer mode (ATM) Adaptation Layer
AAL1
Asynchronous transfer mode (ATM) Adaptation Layer 1
AAL2
Asynchronous transfer mode (ATM) Adaptation Layer 2
AAL3
Asynchronous transfer mode (ATM) Adaptation Layer 3