VoATM
Voice over Asynchronous Transfer Mode (VoATM) is a data protocol used to transport packetized voice signals over an Asynchronous Transfer Mode (ATM) network.[1] In ATM, the voice traffic is encapsulated using AAL1/AAL2 ATM packets.[2] VoATM over DSL is a similar service, which is used to carry packetized voice signals over a DSL connection.[1]
Protocols
[edit]- ATM Adaptation Layer 1 (AAL1)
- ATM Adaptation Layer 2 (AAL2)
Deployment
[edit]VoATM is a multi-service, high speed, scalable technology but rarely found because of its expensive services.[3]
Prioritization
[edit]Fragmentation
[edit]Fragmentation is built into ATM with its small, fixed-sized, 53-byte cells.[3][4]
Variable delay
[edit]Dynamic Bandwidth Circuit Emulation Service (DBCES) does not send a constant bit stream of cells but transmit only at an active voice call, reducing delays and variations.[3]
Echo cancellation
[edit]VoATM transports data, voice, and video at very high speed. The same method for echo cancellation is employed.[3]
See also
[edit]Professional wide band audio over ATM as standardized by Audio Engineering Society in AES47.