![]() You just plug in a cable to one side and ethernet on the other side, and there's a really simple control protocol along with some sample software. The HDHomerun device is very classy: zero configuration (there's a web interface but it has no settings). Speaking of packet loss, my experiments with an HDHomerun Prime (cable TV to IPTV converter) box, and separately/together with some slightly-hacked-up DVR software have been quite informative. There's also next-to-no packet loss, which is much better than Wifi. During that test (which, note, is using the same cable to transmit MoCA and DOCSIS), the TV keeps on coming, glitch-free.Ī quick one-stream TCP iperf test between the two MoCA devices gives 60 MBits/sec, which is less than I get when the two are isolated on their own network with just a short coax cable between them, but still more than Wifi, which is the important thing. ![]() With my system fully connected (cable -> cablemodem -> linksys -> 100Mbit ethernet -> MoCA master -> MoCA slave -> laptop, measures 48MBit/sec downstream and 5.6MBit/sec upstream, which is comfortably close to what I'm paying for, 50MBit/sec down and 6MBit/sec up. These theoretical results bear out in practice. And knowing that, we can also conclude that DOCSIS comes in under 850 MHz as well, so it also doesn't conflict with MoCA. This, in turn, gives me a clue about how DOCSIS works: it literally takes over unused TV channels and uses them for data. The only big change it makes is it allows "bonding" of multiple upstream/downstream channels to increase your transfer rates. I have no way of testing this but it makes sense.) While I was researching, I read up on DOCSIS 3, which of course is an extension of the earlier DOCSIS (cable modem) standards. ![]() (The FAQ tells us that satellite TV does use those higher frequencies, so MoCA isn't compatible with a satellite signal. The key observation is that MoCA uses a frequency range around 850-1550 MHz, while cable TV comes in under 850. I have digital cable TV (as of Thursday) and DOCSIS 3 cable modem, and now MoCA (as of Friday) and it all works together on the same wires. That's why companies like FiOS (which delivers its data over Fiber, not cable) provide MoCA because those now-idle coax cables in your home can be put to good use.Īnyway, the rumours are wrong. I had heard rumours that MoCA ("Multimedia over Coax Alliance", one of the most terrible names for a standard since 802.11ab) only works on an otherwise "interference free" home coax network: that if you had actual cable TV and/or cablemodem traffic, it would interfere. ![]() Here are some MoCA test results from my experiments at home, with some totally off-topic comments thrown in for extra flavour. ![]()
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