Barsick Posted June 13, 2004 Posted June 13, 2004 С чего началось: Сегодня в очередно раз повис EP-816VX, и повис очень странно - половиной портов. Не выдержал, разобрал - оказалось - он двучиповый. Сначала подумал, что на двух RTL8309, объединенных по MII, но присмотрелся - ноги по другому расположены. Оторвал радиатор - оказались две ADM6999 В чем прикол - на плате разведены еепромки, т.е. EP-816VX - это недоделанный EP-816СX, который managed Выдержки из доки The ADM6999U is a high performance, low cost, highly integration (Controller, PHY and Memory) eight-port 10/100 Mbps TX/FX plus one 1.6G Expansion port ADM6999U provides most advance function such as: 802.1p(Q.O.S.), 802.1q(VLAN), Port MAC address Locking, Management, Port Status, TP Auto-MDIX, 25M Crystal & Expansion port Port MAC address Locking function is also supported by ADM6999U to use on Building Internet access to prevent multiple users share one port traffic. Easy Management 32bits smart counter for per port RX/TX byte/packet count, error count and collision count (!!!) 3.2.2.2 Adaptive Equalizer and timing Recovery Module All digital design is especial immune from noise environments and achieves better correlation between production and system testing. Baud rate Adaptive Equalizer/Timing Recovery compensates line loss induced from twisted pair and tracks far end clock at 125M samples per second. Adaptive Equalizer implemented with Feed forward and Decision Feedback techniques meet the requirement of BER less than 10-12 for transmission on CAT5 twisted pair cable ranging from 0 to 120 meters. Транк на 2 порта тоже есть Вставить ник Quote
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