Reqeust info gia 56Kbps modems

[Vasilis Vasaitis]

On Sat, Jan 30, 1999 at 10:16:37PM +0000, Panagiotis K. Prokopiou wrote:
> 
> Koitakse oso katalabei h katastash exei os ekshs:
> Sthn arxh anaptyxuhkan duo anepisima protokola to x2 kai to k52flex ta
> opoia telika kateliksan sto episimo protokolo v90. Osa modem eixan
> kykloforhsei me x2 h' k52flex me ton ena h' ton allo tropo eginan v90
> symbata. Pleon den nomizo na kukloforoun modems me x2 'h k52flex.
> Ta modem afta tora exoun kapoies apaithseis gia na exoun megisth apodosh.
> Apo oti exo akousei prepei na exeis psifiakh grammh kai na syndeese me ton
> paroxea (isp) mono meso psifiakon kentron kai afto pali gia periorismenh
> apostash.
> Oi grammes toy ote omos den nomizo oti antexoyn toso bandwidth kai den to
> theoro efikto na allaksei afth h katastash syntoma logo ypodomhs.
> Afta ksero, afta exo akousei. Diladi pare mia eikona alla mhn to deseis
> oti soni kai kala etsi einai

  Na simpliroso ki ego s' auta...

  Opos eipe o filos Panagiotis, arxika anaptixthikan dio protokola xoris
na einai standard, to x2 apo tin US Robotics kai to k56flex (oxi 52) apo
tin Rockwell, to opoio malista xrisimopoioutan apo oles tis ipoloipes
etairies ektos apo tin USR. Edo tha prepei na simeioso oti simfona me
ereunes pou exoun ginei i megisti taxitita pou mporei na piasei ena modem
sto koino tilefoniko diktio einai 33600. Ta dio auta protokola omos
petixainoun ipsiloteres taxitites epeidi o ISP exei eidika modem pou
sindeontai *entelos* psifiaka me to tilefoniko kentro, etsi oste na
iparxei mono mia analogiki<->psifiaki metatropi, anamesa sto modem tou
xristi kai to tilefoniko kentro. Meta apo kapoious mines antagonismou, ta
dio auta protokolla katatethikan ston ITU-T kai telika proekipse to
pagkosmio standard V.90 (den ematha se poio apo ta dio vasistike kirios).
To V.90, opos alloste kai oi prokatoxoi tou, theoritika pianei taxitites
download mexri kai 56k, omos mexri tora den iparxei anthropos pou na eide
taxitita 56k kai na ezise gia na to diigithei. To upload paramenei mexri
33600.

  Ap' oti fainetai pantos, otan o OTENet zitise eidikes sindeseis apo ton
OTE gia 56aria modem tis pire amesos, eno oi alloi akoma perimenoun. Are i
polli aksiokratia tha mas faei...

Vasilis Vasaitis
vvas at egnatia.ee.auth.gr

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