C220支持高密度业务板,最大可支持()个ONT(OPTICAL NeTwOrk TerMINAL)设备。
单模光纤(Single Mode Fiber):中心玻璃芯很细(芯径一般为9或10μm),只能传一种模式的光。因此,其模间色散很小,适用于远程通讯。
A 2.5 Gb/s (OC-48 or STM-16) optical signal with a dispersion tolerance of 1200 ps/nm goes through fiber with 18ps/nm*km of dispersion. How many 15216-DCU-350 equivalents are needed for enough compensation after traveling 100 km?()
HFC(Hybrid fiber coax)光纤同轴电缆混合体——即光纤同轴混合接入,是采用光纤和()传输数据的宽带
Which three of these are optical channel data unit (ODU) overhead fields? ()
光网络单元Optical Network Unit(ONU)分类主要有()。
光网络单元Optical Network Unit(ONU)分类主要有:()
以下关于视觉字偶距(Optical Kerning)的描述正确的是:()
FTTH(Fiber To The Home)即(),就是一根光纤入户,直接到您家,再通过光猫设备进行信号转换,PPPoe拨号成功即可上网。
A six-strand composite rope made up of alternate fiber and wire strands around a fiber core is called().
C200支持高密度业务板,最大可支持()个ONT(OPTICAL NeTwOrk TerMINAL)设备。
英译中:Optical scanner
Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications?()
A whipping on a fiber line().
OTDR(Optical Time Domain Reflectometer,光时域反射仪)的主要作用包括()。
On both the IBM SAN764B and the IBM SAN384B Fiber Channel Directors, all of the followingSmall Form Pluggable plus (SFP+) optical transceivers are supported EXCEPT:()
A 2.5 Gb/s (OC-48 or STM-16) optical signal with a dispersion tolerance of 1200 ps/nm goes through fiber with 18ps/nm*km of dispersion. How many 15216-DCU-350 equivalents are needed for enough compensation after traveling 100 km?()
“光学字偶距(Optical Kerning)”的功能是什么?()
Fiber to the office是指()。
Which of the following should be noted when performing hardware loop on optical interface through fiber?()
The disadvantage of optical fiber communication is high transmission loss. ()
What type of optical fiber is used for the connection inside the M600 rack?()
FTTB,即Fiber to The Building(光纤到楼),它是利用()技术,光纤直接到小区里,再通过双绞线(超五类双绞线或4对非屏蔽双绞线)到各个用户。
Compared with multimode fiber, the main characteristics of single-mode fiber are()