Ethernet connection speed (NAC N-272 / Unitiserve

All the Naim streamer (all audio streamers) support 100Base-T  (100mbps) 

Thank you Mike but that confuses me more!

Are you saying that it is correct that the US will connect at 1000 but the N272 only 100 ?

Yes its correct,   the US is a server,  the 272 is a renderer (streamer)   & I think if you check with the spec's on other servers such as NAS units, they are all 1000mbps.  

Don't confuse 1000mbps with speed.   Its the fault of all the equipment suppliers with their "high speed" claims, its not high speed at all,  its high capacity.   Bits Per Second is bandwidth,  its like a pipe (think of bits as litres)  how many litres of water per second does the pipe width (size) allow to flow.  The 272 receives at a lower flow rate,  thats good,  if the 272 required a stream flow more than the source, wiring, router/switch could supply, it would be in trouble    

Thank you Mike.

I'm quite good with networking  but not up to date on the terminology used in networked audio such as 'streamers', to me it sounds like it should be streaming something out rather than in!!!

I just wanted to make sure my 272 wasn't faulty or my little Fluke link sprinter hadn't started telling lies to me.

Its streaming into  ..........  from t'internet & from your US.

What US version do you have HDD or SSD/NAS ?,   I looked at your profile & see no mention of US (or 272)  .......   How do you manage backups with your US  ???

Mike - I didn't follow your point about not confusing bandwidth and speed. Technically the term is referred to as port speed. It is precisely that - the serial speed in terms of bits per second across the link including encapsulations and overheads that the ethernet connects at providing a given data bandwidth. I can only think the capacity you might be referring to  is above the transport layer after the error correction is applied and the application payload data reconstructed - but that  is abstracted away from the actual transferred on the link..and is hidden from layer two devices such as switches that can only see the link data speed. - but on a reliable, low latency link such as on a wired home network then the port speed is a good indicator of available throughput- of course at transport layer if the receiver or sender is full or busy then they  will/should control the flow control as appropriate - but the port speed on the link stays the same irrespective what is happening with the actual application data throughput.

So a 1000BaseT link has a speed 10x faster than a 100BaseT link and can potentially transfer data 10x faster. I think from a layman point of view you can keep it simple like this - the nuances of flow control, sockets and application throughput are not really relevant for link speeds and has no or little  bearing on 100BaseT or 100BaseT connections and I am sure would confuse those who don't really understand how TCP/IP works.

Simon

Wow just looked at my profile, that is VERY out of date!

Long story short, I sold everything and started again.

Current system is US, NAC N-272, XPS2 DR, NAP250.2 DR, Tannoy GRF Memory 15" DCs with custom external crossovers. I've just added a balanced power supply that feeds the 272 (XPS) and 250 only.

272, xps and 250 are on Fraim and the US is in my network cupboard. Everything talks via a proper commercial Cisco 48 port Gigabit POE switch.

Backup from the US is to a Synology rack-mount NAS which I already had as an ftp for my IP security cameras.

At the moment I'm manually backing up the US 'download folder' on a calendar schedule but I would like to find a robust way to automate that too.

The whole thing sounds much better than it has any right to cost wise but I'm currently building crossover V2 as I think I can improve things a bit in that area.

PS US is a HDD

Simon-in-Suffolk posted:

Mike - I didn't follow your point about not confusing bandwidth and speed. Technically the term is referred to as port speed.

Yes I know its called port speed Simon,  but isn't bits per second is describing how much data is/can be sent over a connection in a given amount of time.   http://techterms.com/definition/bandwidth

yes however perhaps best keep clear the difference  between bandwidth of a physical network connection which typically is  bits per second on the wire and  on the port  with  actual application data throughput and speed which could be using HTML and WSDLs for example ... I have a big headache with a l client who did just that at the moment... there are many levels of abstraction and indirection between the two... and for a given slot of time the two can be quite different.

The ongoing issue with Tidal and some of our streamers is a great  example of these differences.

I guess the point is that 100MB/sec is a fair bit more than any stream the 272 is capable of handling, so although it seems a bit like outdated technology, it's enough. 

Sounds great and I have no network drop-outs or other problems so I guess it is :-)

Hi I have just purchased a 272 and also have a 250-2 and unitiserve. What is the best way to connect my 272 and US. I replaced my Superuniti with the 272 and hoping for an improved performance.

Connect the 272 to your network in exactly the same way as you did the SU and it should find your Unitiserve. 

I have the same set-up and find the US sounds better via upnp than toslink or digital cable. I suspect this may be because using upnp I can locate my US and its psu well away from my 272.

I have just purchased a 272 to replace my SU - i would really would like to know whether  UPNP, Toshlink or a Quality Digital Coax cable would be the best method to connect my unitiserve to my 272. I also have a 250-2 in my system. would really approach some sound advice

Hi,

i would choose UPNP. Try a short, unshielded cable to connect the 272.

Yes, use upnp. Connect the serve and the 272 to a switch, and the switch to the router.