The transfer of voice over an X. 25 network is very problematic because of too large end-to-end delay and fitter on this delay.

在X.25 网上传送话音很成问题，因为端到端的延时太长，而且在时延上有抖动。

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The network could provide good quality of service (in packet loss rate and the packet transfer delay) and be compatible with a variety of services.

网络能提供较好的服务质量(包丢失率和包传输延迟)并兼容多种业务。

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