Is that 100 Mbps Ethernet vs telephone pin assignment correct? I thought that the inner pairs that are treated like RJ11 would be the telephone lines and the outer pairs would be Ethernet.
Edit: apparently it is right. I hate how intuition based on principles of simplicity and signal integrity are betrayed at every level of classic Ethernet.
RJ45 8P8C is compatible with telephone RJ11 6P6C for two lines. The inner pins are one line, the next outer pins are second line. The third line in 6P6C doesn't work because the third and fourth pairs are together. But RJ11 using more than two lines, or even multiple lines, are pretty rare.
Right but all that means is that you have a termination that can be implemented in cases where not all features are available. It indicates that it's either the wrong termination or the wrong jack.
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Is that 100 Mbps Ethernet vs telephone pin assignment correct? I thought that the inner pairs that are treated like RJ11 would be the telephone lines and the outer pairs would be Ethernet.
Edit: apparently it is right. I hate how intuition based on principles of simplicity and signal integrity are betrayed at every level of classic Ethernet.
https://en.wikipedia.org/wiki/Modular_connector#8P8C
RJ45 8P8C is compatible with telephone RJ11 6P6C for two lines. The inner pins are one line, the next outer pins are second line. The third line in 6P6C doesn't work because the third and fourth pairs are together. But RJ11 using more than two lines, or even multiple lines, are pretty rare.
Right but all that means is that you have a termination that can be implemented in cases where not all features are available. It indicates that it's either the wrong termination or the wrong jack.