q (17.3.2006 11:11:18)
no to je uplne jednoduche telekom totiz prestal dodrzovat standarty a vsude do dratu pousti rychlost 4000/512 coz samozrejmne vetsina dratu nestiha a naskakuji tam HEC FEC a CRC erory jak blazen dale roste sum jak prase a hlavne si kazdy modem pocita s rychlosti uploadu co mu signalizuje dslam hodnotu PCR - Peak Cell Rate jinak receno jakou maximalni rychlosti muze odesilat pakety do ATM site a proto to blbne vlezte si do modemu najdete si tam ve statistice hodnoty utlumu a sumu a porovnejste s touhle tabulkou vetsina modemu ukazuje i hodnoty FEC HEC a CRC SUM - Signal to Noise (SNR): 5db or below =bad, no sync/intermittent sync 8db-13db = average - and no sync issues 14db-22db = very good 23db-28db = excellent 29db-35db = rare, can throw a rock at co/remote UTLUM - Line attenuation teens = rare, great copper lines, close to C.O./Remote 20-30 = excellent 30-40 = very good 40-60 = average 60-65 = poor 65 and above will have issues
