question

ahaha · 发表于 2003-10-27 21:27:48

According to the IEEE 802.3 CSMA/CD specification, which is proper signal for contact 6 of a PHY without an internal crossover MDI Signal? A. Receive + B. Transmit + C. Receive – D. Transmit –

ahaha · 发表于 2003-10-27 22:46:47

问题在于without an internal crossover MDI Signal?这是什么意思

westwindy · 发表于 2003-10-30 12:34:48

就是不用级联口(交叉)嘛 这就是上面贴图中的情况了呗 哈 我猜的

chinamoon · 发表于 2003-10-27 22:34:02

去看看综合布线吧。第6针是如何用的。

飞猴 · 发表于 2003-10-27 22:38:08

我有做到一题类似的，AHAHA这不是NA的题吧？ 胡大顺便讲解一下，就是TX和RX两条线～

chinamoon · 发表于 2003-10-27 22:39:08

<BLOCKQUOTE>引用：<HR Size=1>原文由 ahaha 发表: According to the IEEE 802.3 CSMA/CD specification, which is proper signal for contact 6 of a PHY without an internal crossover MDI Signal? A. Receive + B. Transmit + C. Receive – D. Transmit –<HR SIZE=1></BLOCKQUOTE> <img border=0 src=http://www.spoto.net/bbs/images/upfile/2003102722393.gif onload="javascript:if(this.width>screen.width-300)this.width=screen.width-300">

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