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
- ATM Adaptation Layer 1 (AAL1)
- ATM Adaptation Layer 2 (AAL2)
Deployment
VoATM is a multi-service, high speed, scalable technology but rarely found because of its expensive services.[3]
Prioritization
Prioritization is implemented through QoS parameters.[3]
Fragmentation
Fragmentation is built into ATM with its small, fixed-sized, 53-byte cells.[3][4]
Variable delay
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
VoATM transports data, voice, and video at very high speed. The same method for echo cancellation is employed.[3]
See also
Professional wide band audio over ATM. Audio Engineering Society AES47
References
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