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About calis

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  1. Since you asked how to do it, and not whether it was a bad idea: Jumbo/Giant Frame Support on Catalyst Switches Configuration Example WWW.CISCO.COM This document provides a sample configuration for Maximum Transmission Unit (MTU) sizes supported across all of the Cisco Catalyst-series switches on Ethernet-based ports. Skip to the: Use the system mtu jumbo command to change the MTU for all Gigabit Ethernet interfaces. This command only affects Gigabit Ethernet Interfaces. Verify Use the show system mtu command to view the MTU sizes after reload. Plug all your audio devices into that switch. Don't change the vlan assignments. Don't plug in the TPLINK unless you can change a specific interface's MTU to match the 2960. Run it and see how it "sounds", and don't listen to those experts who poo poo the idea that unicorns stroke the binary as it flows through an audiophile switch. I'll be surprised if any of your audio kit actually supports a higher MTU than 1500, but I wish you the best of luck on your wonderful journey of learning.
  2. Telstra buys O2 Networks for $60 million WWW.TECHNOLOGYDECISIONS.COM.AU Telstra has acquired network solutions provider O2 Networks in a deal reportedly worth $60 million. His sales technique is fine.
  3. I commented about the audiophile network switching. Returned to the same topic with my remaining second post. I can understand ground plane isolation. A D-Link copper router in the middle won’t help and that was my topic of interest. It’s also of interest where you’re plugging in that active optical converter, it’s a logic jump to say the original device (and the circuit it’s plugged into) was noisy but the converter isn’t. That’d be worth some experimentation. We can leave the debate on cinnamon cables versus generic for another day & thread. It seems other posts suggesting a listening session were also removed.
  4. The theory behind optical decoupling is a lot better. Or, you could simply use wifi. Wifi kit operating at 1gbps (1 gigabit per second) is common these days. Only need 2mbps to play 48kHz 24-bit stereo WAV files.. If that was your choice at the heaviest end of the scale. All the benefits of optical decoupling and you know, free because you'd have a wifi router at home. Even the oldest 54mbps b/g/n routers are exponentially faster than what you need. Taking it a step further, if you're only playing digital sources there is nothing really stopping you from going wifi speakers with inbuilt amplification, like the kef wireless stuff. The theory is solid, can synchronise playback down to sub ms with a bit of effort. Avoids all the issues with coupling, analog signal interference is 'within the speaker box'. Kef etc are early in the game but I've seen the playback componentry boards on the market and its obvious they're improving quickly.
  5. I've posted what I think provides the optimum listening experience. I feel the ambient texture of the music is smooth, yet has that mid section strength that we love to hear!
  6. If the carriers, banks and high frequency trading guys hired you to design and consult on their networks it’s fair to say you know enough of that troublesome science and engineering stuff to comment with serious experience on Ethernet network tweaks for audiophile equipment. Purely on topic on ‘audiophile network tweaks’, I’ll give you some free advice: - buy a $10 blue network cable. They’re all the same. They either work or don’t work. Go structured cabling if going through ceilings etc. - modern consumer home routers are excellent. Hardwire your DAC and media centre into it. It’s likely better quality than that old dlink on the site linked above. - sit back and enjoy. You can Rest In Peace because every packet is transferred precisely, even on 15 year old $100 switches. The OSI model talks about how physical, protocol and processing layers interact. The great news is even if you buy an expensive cable or switch the bits traverse the same path in the same error corrected packets to be serialised onto the wire and then reassembled and validated against the check bits at the other side. The network chip on the dac will do that, so if you can’t trust your dac to have a decent $5 Ethernet chip that hasn’t changed in 15 years or a buffer for a few ms of data then grab another DAC! so stop worrying and enjoy your music
  7. "There is now strong evidence to support the fact that the transmission and processing noise at source and dac contribute to timing errors (jitter) in the analog output of the DAC". Are you changing the topic to processing within a device? The prior topic was audiophile grade networking switches aka this pure comedy: http://www.myhifishop.de/Devices/AQ-SWITCH-AQVOX-Audiophile-Network-SWITCH-8-Ports::75.html?language=en "Improves sound quality and picture quality. (All video and audio formats, all resolutions)" . - I thought the general agreed consensus that meddling with the original source was a 'bad thing'? "De-Noiser" - yes, the cheapest DLink switch with a different power supply is going to magically "de-noise" the network. All my years with banks and datacentres, they strangely never asked me to 'de-noise' it. " For LAN cables over 10m length it cuould be considered to use an AQVOX switch as repeater." - Wait a second. You're wanting to boost a cat5 signal?! By putting another switch in the path? Cat5e is good for 120metres, what are these crazy kids talking about? I want to learn more. "1000 Mbit/s - 1 Gigabit, up to 2000 Mbit/s - 2 Gigabit in full duplex mode" - ...eh? What? there is a 2 Gigabit ethernet standard? Wow! All these years just thinking it was 10/100/1000/10000 (and of course etherchannel etc bundles). These guys have managed '2 Gigabits in full duplex mode', I'm glad they've decided to count the bandwidth both ways and then add them together. Neat! "Improves video and sound reproduction (all video and audio formats, all resolutions)" So if I played one night in Paris, will it be in 4k? I've read emails from Nigeria that made more sense. We digress. If I can reword your statement to what I think you meant: 'processing noise' on the transmission between source and DAC contribute to timing errors (jitter) in the analog output of the DAC. Ok, so we have presumably a cat5 network cable and two endpoints. A media server and a DAC, both presumably with 1gb network ports. You're saying that when the media server transfers the music file data that it's introducing some kind of noise to the data packet? Since it's a computer, we can, unlike your listening experiences, perform a detailed export of every one and zero that went across the network and neatly validate that yes, you received exactly what was on the media server. The bonus is that it's done automatically. Those data packets have integrity checks built in, and if in the unlikely situation it doesn't match it retransmits it. Which is useful if you're using a satellite radio in the middle of africa. It's even on this forum post reply zinging its way across the internet tubes as I chuckle and go to bed shaking my head in amusement at 'de-noisers'. edit: fixed the fonts.
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