The scheme provided reserved channel for handover call to reduce blocking probability of handoff call.

该方案为切换呼叫提供了保留信道，降低了切换呼叫的阻塞概率。

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An SDP client communicates with an SDP server using a reserved channel on an L2CAP link to find out what services are available.

SDP客户端使用L2CAP链接上的保留通道与SDP服务器通信，来发现哪些服务可用。

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The reserved channel is dedicated to SDP communication so that a device always knows how to connect to the SDP service on any other device.

保留通道专用于SDP通信，因此设备总能知道如何连接其他设备的SDP服务。

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The connections at each end create a channel reserved for the duration of a call.

ECONOMIST: Internet telephony