“VoATM”的意思、由来-开放百科全书

词条

VoATM

释义

Protocols
Deployment
Prioritization
Fragmentation
Variable delay
Echo cancellation
See also
References

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]

References

1. ^¹Tamara Dean. Network+ Guide to Networks. Course Technology, Cenage Learning, 2010, p. 533.
2. ^Cisco , Voice over ATM (VoATM)
3. ^¹²³⁴Ahmed, Fatima. , developer.com, November 24, 2003, accessed April 26, 2011.
4. ^AAL Types , accessed April 26, 2011

3 : Broadband|Videotelephony|Audio network protocols

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