| Abbreviation | Definition |
|---|---|
| AATN | Anti Abuse Telco Network |
| AAV | Alternate Access Vendor |
| ABA | ADSL Broadband Amplifier |
| ABE | Aggregate Business Entity |
| ABR | Adaptive Bit Rate |
| ABR | Available Bandwidth Rate |
| ABR | Available Bit Rate |
| ABTA | Associa????o Brasileira de Telecomunica????es por Assinatura |
| ABTA | Associação Brasileira de Telecomunicações por Assinatura |
| ABTL | Aditya Birla Telecom Limited |
| AC | Always Connected |
| AC | Area Code |
| AC | Armored Cable |
| AC | Authorization Center |
| ACA | Automatic Circuit Assurance |
| ACAP | Application Configuration Access Protocol |
| ACC | Automatic Carrier Control |
| ACD | Apex Collaborative Dialing |
| ACD | Automatic Call Distribution |
| ACF | Access Coordination Function |