On 2/27/2015 4:32 PM, Naslund, Steve wrote:
You could do that. The only issue is that you are putting in more intelligent CPE that has to be frequency agile and signal to the head end what is happening. Carriers are very sensitive to CPE costs so I don't think that is likely to happen especially since I think that DSL is not considered leading edge service any more. I would expect the carriers to devote more effort to FTTP efforts than to keep trying to advance DSL.
More intelligence in the chip that drives the connection. The CPE is generally wrapping around that chip. FTTP sounds great, but it just isn't appropriate in every scenario.
Sorry, no frequencies to play with on Ethernet. Ethernet is a baseband technology (i.e. DC voltage, not AC frequencies) One pair is transmitting, one pair is receiving in gigE. If you want to use both pairs in the same direction to double up the bandwidth, that could be done but it would not be Ethernet anymore. If you want to talk both ways on the same pair, that is half duplex, we've left that idea in the dust years ago. S
I don't mean to argue, as I am by no means an expert, but I'm pretty sure that 1000Base-T is 4 pairs bidirectional. Wikipedia may have lied to me, though. My presumption is that anything supporting bidirectional communication on shared media can somehow shift that communication from symmetric to asymmetric dynamically. Jack