OTN（Optical Transport Network)的中文含义是（)。

A.A. book space

B.B. choose the mode of transport

C.C. arrange for customs clearance

D.D. weight and measure the goods

汉译英：“到岸重量；延期交货；运费”，正确的翻译为：()。

A．lading weight; delivery late; transport charge

B．lading weight; late delivery; freight charge

C．shipment weight; late delivery; transport charge

D．shipment weight; delivery late; freight charge

A.The average optical power of the optical interface is measured as follows. One end of the pigtail is connected to the light emitting interface of the optical board and the other end is connected to the input interface of the optical power meter. After the optical power becomes stable, read the value, which is the transmitting optical power of the optical interface.

B.The average optical power of the optical interface is measured as follows. One end of the pigtail is connected to the light receiving interface of the optical board and the other end is connected to the input interface of the optical power meter. After the optical power becomes stable, read the value, which is the transmitting optical power of the optical interface.

C.The sensitivity and overload indicator of optical interface are measured as follows. Increase the adjustable optical attenuator gradually and observe the critical value when the optical interface generates an error code. Record the optical power value at this time, which is the sensitivity.

D.The sensitivity and overload indicator of optical interface are measured as follows. Reduce the adjustable optical attenuator gradually and observe the critical value when the optical interface generates an error code. Record the optical power value at this time, which is the overload indicator.

ＯＷＭ的英文全称是（）。

A. Optical Wavelength Multiplex

B. Optical Wavelength Monitor

C. Optical wavelength Memory

D. All

A.OTS(Optical Transmission Section)光传输段

B.OMS(Optical Multiplexing Section)光复用段

C.OCh(Optical Channel)光信道

D.ODU(Optical channel Data Unit)光通道数据单元

ansmit data.

transmit data.

A.OLT(Optical Line Terminal)

B.ODN(Optical Distribution Network)

C.ONU(Optical Network Unit)

D.WDM(Wavelength Division Multiplexing)

Which of the following order is correct about the internal tail fiber？ ()

①Insert the tail fiber between subracks in the related interface, and bind the extra optical fiber by the yellow adhesive tap, fixing it on the cable immobility board inside the routing area to the right of the rack after routing the fiber through the routing slot in subrack.

②Insert the tail fiber between subracks in the related interface, and fix the extra optical fiber in the fiber-coiling box on the right of the subrack after routing it through the wire-routing slot. When there is very few internal fiber, you can also put the fiber-coiling box on the left of the rack.

③Arrange the optical fiber neatly, and put optical fiber tag on it.

④Decide the wiring path of the optical fiber and put tag on it according to the position of the interfaces on both ends of the optical fiber.

⑤Adopt a sequence of bottom up and from left to right when connecting the optical fiber on the ODU and the OMU board, and the fiber connection order on the OTU board should be the same. When there are multiple OTU subracks on the ODU or the OMU board, first connect the optical fiber between subracks first, and then connect the optical fiber inside the subrack.

A.③-⑤-②-①-④

B.③-⑤-①-②-④

C.④-⑤-②-①-③

D.④-⑤-①-②-③

A.SC-LC

B.LC-SC

C.LC-LC

D.SC-SC