Hvala obojici. Inače telefonski kabl mi je dužine 10 metara, a realno mi treba 7. To ću ovih dana da sredim. Koliko tih 3 metra mogu da dodatno poprave kvalitet linije?
Tih 3 metra ti je skoro nebitno, ali u svakom slucaju nece smetati da skratis kabel. Najbolje da ti je taj kabel samo od uticnice do modema ispod metra ali ako ne moze nije veliki problem. Kod mene desetak metara kabela ne pravi nikakvu razliku (probano) ali je brzina samo 20M DL...
@Joker
Interleaving and fastpath
ISPs (rarely, users) have the option to use interleaving of packets to counter the effects of burst noise on the telephone line. An interleaved line has a depth, usually 8 to 64, which describes how many Reed–Solomon codewords are accumulated before they are sent. As they can all be sent together, their forward error correction codes can be made more resilient. Interleaving adds latency as all the packets have to first be gathered (or replaced by empty packets) and they, of course, all take time to transmit. 8 frame interleaving adds 5 ms round-trip-time, while 64 deep interleaving adds 25 ms. Other possible depths are 16 and 32.
"Fastpath" connections have an interleaving depth of 1, that is one packet is sent at a time. This has a low latency, usually around 10 ms (interleaving adds to it, this is not greater than interleaved) but it is extremely prone to errors, as any burst of noise can take out the entire packet and so require it all to be retransmitted. Such a burst on a large interleaved packet only blanks part of the packet, it can be recovered from error correction information in the rest of the packet. A "fastpath" connection will result in extremely high latency on a poor line, as each packet will take many retries. (Preuzeto sa
https://en.wikipedia.org/wiki/Asymmetric_digital_subscriber_line#Interleaving_and_fastpath)
U prevodu, ako ti je kvalitetna linija stavlja se "fastpath" jer dodaje najmanju latenciju na prenos podataka.
U slučaju nekih smetnji stavlja se Interleaving (dubine od 8 do 64) koji poboljšava korekciju greške tj. poboljšava integritet podataka, ali ti dodaje latenciju (od 5ms do 25ms).
Mislim da je procedura takva da ti puste brzinu koju si uplatio, pa ako postoje neki problemi kao npr. često pucanje konekcije, onda se stavlja na Interleaved i povećava njegova dubina dok se ne postigne maksimalno stabilna konekcija...
al' *mjau**mjau**mjau*a covek daleko od centrale i tu nema pomoci (mislim na Sasa38 screen shot, pojavilo se jos par postova pa da dodatno pojasnim)...
