深圳長(zhǎng)欣自動(dòng)化設(shè)備有限公司

51304812-200

51304812-200

51304812-200以太網(wǎng)轉(zhuǎn)E1技術(shù)的主要難點(diǎn)集中在MII接口、E1接口和緩存間的數(shù)據(jù)交換上由于以太網(wǎng)MII接口的時(shí)鐘為25MHz,而E1的作時(shí)鐘為2048MHz,各個(gè)模塊間的數(shù)據(jù)交換為異步過(guò)程,為保證數(shù)據(jù)交換的準(zhǔn)確性,需使用握手機(jī)制來(lái)實(shí)現(xiàn)模塊間的同步和避免對(duì)緩存訪問(wèn)的沖突在解決了如何利用單路E1經(jīng)濟(jì)方便的實(shí)現(xiàn)以太網(wǎng)傳輸?shù)膯?wèn)題后,另個(gè)問(wèn)題卻接踵而來(lái):帶寬與新型業(yè)務(wù)的出現(xiàn)總是具有良性互動(dòng)增長(zhǎng)的特性,因此,在對(duì)以太網(wǎng)的傳輸和接入的網(wǎng)絡(luò)建設(shè)也必須兼顧現(xiàn)有的帶寬處理能力與未來(lái)的擴(kuò)充能力,才能在不斷成長(zhǎng)的需求中體現(xiàn)業(yè)務(wù)平滑升級(jí)與設(shè)備保障的好處單E1接入以太網(wǎng)這樣的方式不能滿足上述需求,所以我們有必要讓用戶根據(jù)需要來(lái)靈活、方便的配置E1的數(shù)量來(lái)傳輸以太網(wǎng),這樣既能滿足不同用戶對(duì)帶寬的不同需求,又能滿足以后網(wǎng)絡(luò)升級(jí)的需要,而且由于是基于E1的顆粒度使帶寬的利用率較高,且網(wǎng)管簡(jiǎn)單因此用能靈活配置E1數(shù)目的協(xié)議轉(zhuǎn)換器來(lái)實(shí)現(xiàn)以太網(wǎng)的傳輸不管在今天單E1還是明天要帶寬升級(jí)到多E1都是必要和合理的 

Swagelok B-42S4 Whitley Brass Ball 1/4" Valves and a 250-2456-B ASHCROFT Maximu
TECH TOWN ENTERPRISE B4P2303H FAN TUBEAXIAL, 230VAC, 50/60Hz, 22/21W
BANDO B76 V-BELT
WESTINGHOUSE BAB2010HT 2-POLE 10A Circuit Breaker
M WATANABE AND CO LTD BB10-300792-12 PIN, LLM QUARTZ B
CORRECT-TOUCH BEARD COVERS Beard Covers DISPOSABLE SPUNBONDED POLYPROPYLENE PAC
HY-MAG Circuit Breaker IND BEBG0046 Circuit Breaker, 25A, 35V DC, Curve: BS, Cl
Technologic Systems BF30 Parallel to Parallel Buffer, 2MB
Canon BH6-6595 Canon BH6-6595 AC Conversion Cable(UPS)
Canon BH6-6596 Canon BH6-6596 D-Sub Conversion Cable
Fuji Electric BLA010 3A, 600V, Fuse - Link, Pack of 4
CANON BS2-4304-000 CANON TIMING BELT
CANON BS2-4300-000 CANON TIMING BELT
CANON BS2-4305-000 CANON TIMING BELT
CANON BS2-4308-000 CANON TIMING BELT
CANON BS2-4309-000 CANON TIMING BELT
CANON BS2-4320-000 CANON TIMING BELT
CANON BS2-4321-000 CANON TIMING BELT
CANON BS2-4322-000 CANON TIMING BELT
CANON BS2-4323-000 CANON TIMING BELT
Turck BSM BKWM 19-997-4/S101 6FT U0982-15 Cordset
SOJITZ PLA-NET C-1156-003-0001 PULLEY, (1) SUS304
SOJITZ PLA-NET C-1156-004-0001 PULLEY, (2) EPO-222