Bedienungsanleitung Noxon iRadio for iPod (Seite 56 von 65) (Englisch)

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56 ENGLISH

Accordingly, you can also load an existing favourites file using the "Load local favourites" menu item.

Dealing with tough network problems...

B5 The necessary basic knowledge

Time to get technical! At this point we will be taking a closer look at what happens when establishing a

connection between the NOXON and the media or music server. While it might seem a bit dry and obscure

for the layman, possessing this knowledge will make a definite impression in certain circles. But of course,

it would be even better if it were to help you get to the bottom of any communication problems between the

server and the NOXON. Unfortunately, from time to time it may be impossible to establish a connection to

the media server. Problems that cannot be solved with the information provided earlier tend to be nontrivial,

but a systematic approach can nevertheless pinpoint them fairly quickly. Per-

forming the troubleshooting work takes basic knowledge of network technology

and an understanding of some specialised terminology.

My type, your type. As a rule, the current version of the Internet protocol (IPv4)

distinguishes between A, B, C and MC address ranges. With the exception of the MC network, they are very

similar technically and roughly describe the size and scope of the network (number of computers per net-

work). The smallest network type, the C network for a maximum of 254 computers, is generally used in

home environments. As described above, most of the computers then "answer" to addresses such as

192.168.0.100, 192.168.0.55 or similar, sharing the first three blocks, i.e. 192.168.0. All of the computers

on the network can be reached via a single IP address, the so-called broadcast address, 192.168.0.255 (in

the network, 192.168.0.0/24). A slight modification of this technique is used by our NOXON. If you have set

everything up correctly, the NOXON will be located in the same network address range as the music server.

Let's have a closer look at the connection process.

The music server starts and sends a broadcast ("Hello, I'm a music server and this is my address!") to the

address 239.255.255.250. This address is in the MC or multicast range (similar to a broadcast address like

the one above, but one that reaches all lower-level networks at the same time) and will be received by all

devices, including the NOXON. The NOXON continuously monitors port 1900 for such broadcasts in order to

detect new media server friends.

Note: The SSDP service is used by Windows to detect Universal Plug & Play components such as

our NOXON. The service is enabled by default in Windows XP and searches in the background for

suitable devices.

The NOXON, on the other hand, sends a normal TCP/IP connection request to the target port 8080 (HTTP),

transmitting its so-called client description to the music server. This description contains information on the

NOXON and what it can play.

The server in turn sends a detailed description of itself (server, version and available services) to the

NOXON. Everything is provided by the music server, depending also on the server's version and type. If you

decide to sort by ARTIST, for example, the NOXON will send a query to the server ("Send me a list of all of

the artists you have stored!"). The server will then send the contents of the directory, in this case the ARTIST

list according to the filter rules transmitted by the NOXON.

Select a track to play and the music server will transfer it. The server will start the transfer on port 1024, but

will change it regularly during the transmission.

Missbrauch melden von Frage und/oder Antwort

Libble nimmt den Missbrauch seiner Dienste sehr ernst. Wir setzen uns dafür ein, derartige Missbrauchsfälle gemäß den Gesetzen Ihres Heimatlandes zu behandeln. Wenn Sie eine Meldung übermitteln, überprüfen wir Ihre Informationen und ergreifen entsprechende Maßnahmen. Wir melden uns nur dann wieder bei Ihnen, wenn wir weitere Einzelheiten wissen müssen oder weitere Informationen für Sie haben.

Noxon iRadio for iPod Seite 56

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