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

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

  1. 1 2 Tamara Dean. Network+ Guide to Networks. Course Technology, Cengage Learning, 2010, p. 533.
  2. ↑ Cisco , Voice over ATM (VoATM)
  3. 1 2 3 4 5 Ahmed, Fatima. , developer.com, November 24, 2003, accessed April 26, 2011.
  4. ↑ AAL Types , accessed April 26, 2011
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