Q433. Which of the following statements about overhead bytes is wrong?

Q434. When the circuit board detects the B1 byte and finds that the bit error rate of the signal in the regeneration section exceeds 10-3, it reports a B1_SD alarm.

Q435. If there is no plug-in board on the hardware, which of the following indicator light of SSN1PQ1 will be red?

Q436. Which of the following alarms can trigger the 1+1 protection on the client side? (Multiple choice)

Q437. The protection channel of the 1+1 linear multiplex section can be configured with additional services.

Q438. According to the conversion formula of milliwatt (mw) and milliwatt decibel (dBm), how much dBm is approximately equal to 500 mm? (1g5=0.7)

Q439. In an 80-wave system, using the TMB1DAP (TM150AC106) amplifier, the total input power is known to be -19~1 dBm. The typical gain is 19 D, what is the nominal single-wavelength output optical power?

Q440. The DWDM system has extremely high requirements on the stability of the light source. Which of the following factors affect the stability of the light source? (Multiple choice)

Q441. For the relay type OTU board, which of the following alarms will continue to be sent downstream? (Multiple choice)

Q442. LAG can only be configured in non-load sharing mode

Q443. MPLS label allocation is divided into static allocation and dynamic allocation. The static allocation label has no allocation principle as long as the values of each label are different.

Q444. The () function of the 0A module of the EMR8 single board makes the system increase or decrease one or several channels or when the optical signal of some channels fluctuates, without affecting the signal gain of other channels.

Q445. 1510nm optical monitoring channel can be effectively amplified by EDFA.

Q446. In the fault handling scenario, the loopback method is one of the commonly used fault location methods. Which of the following descriptions about the loopback method is wrong?

Q447. The ODUk SNCP protection cannot be switched automatically. Which of the following options is the possible reason? (Multiple choice)

Q448. The pointer is used for alignment. Indicates the starting position of the VC in the corresponding AU or TU. In this way: the corresponding VC can be correctly removed from the STMN, and then the VC and C packages are divided into separate low-rate signals, such as PDH: That is to say, the low-rate tributary signal can be discarded directly from the STMN signal.

Q449. Which of the following alarm/event dump modes does U2000 support? (Multiple choice)