Other Parts Discussed in Thread: DP83849ID My PCB board has a DP83849ID chip, now there is a strange problem bothers me. When it can communicate with a computer properly, but sometimes it can not establish a link with the switch. I use a multimeter to…
Other Parts Discussed in Thread: DP83849ID 我们的产品的以太网信号通路如下图所示,由于需要双网口,但是装置对外只有一个RJ45接口,所以我们的产品内部的双绞线的8根线全用上了,1236分传输网口A的信号,4578传输网口B的信号。我们产品通过电缆与外部通信设备 连接,电缆中也只有一根双绞线,但是在电缆的另一端8根线分成两组,分别同时接两个RJ45水晶头的1236脚,这样就与其它设备兼容了。
出现问题是网口A在现场运行时无法与思科的交换机连接(电力系统中应用…