D-channel

基本解釋

Traffic over the D channel employs the Link Access Procedure on the D Channel (LAPD) protocol.
在D通道上的流量須應(yīng)用在D通道上的鏈路存取程序(LAPD)之協(xié)定。
A long distance phone company can provide ANI which may arrive over the D channel of an ISDN primary rate interface circuit or via a dedicated single line before the first ring.
美國有各種ANI，長話公司能提供ANI，它可在ISDN基本速率接口電路的D信道上到達(dá)，或在首次振鈴之前通過專用線到達(dá)。
The D channel carries signaling messages, such as call setup and teardown, to control calls on B channels.
通道所運送的是傳訊訊息，例如是用來控制B通道傳呼的呼叫建立與解除。
Because it uses two B channels and one D channel, BRI is sometimes referred to as 2B+D.
由于它采用2條B通道及一條D通道，故BRI有時候會被寫成2B+D。
Primary Rate Interface (PRI) is an ISDN interface for primary rate access , which consists of a single 64-kbps D channel plus 23 (T1) or 30 (E1) B channels for voice or data.
主速率接口是一個適用于主速率通道的ISDN接口，它是由一個單個的64-kbps的D通道再加23個（T1）或30個（E1）語音或數(shù)據(jù)B通道構(gòu)成的。