(single) The IMGP version on the MA5680T is configured as V3. What happens when the MA5680T receives the IMGP leave message forwarded from the ONT?

A. Send a general group query message

B. Send a specific group query message

C. Do not do anything

D. None of the above

(multiple) What are the possible positioning methods when the "echo" fault occurs in the VoIP PSTN telephony service?

A. Check if the acoustic echo is caused by the terminal phone.

B. Check if the PSTN port transmit gain is set too large.

C. Check if the DSP chip input gain (PCM->IP) is set too large.

D. Check if the EC switch (echo suppression switch) of the peer device is turned on during the call.

Single) Regarding MA5680T multicast, which one is incorrect?

A. The report sent by the user is captured on the board logic and sent to the CPU of the board.

B. The multicast program creation mode is divided into static configuration and dynamic join.

C. When igmp match mode is disabled, you need to configure the multicast program group.

D. Add igmp user under BTV. By default, a multicast user can watch 8 programs.

(single) Which of the following queue scheduling techniques does the MA5600T/MA5680T support?

A. CBQ

B. PQ

C. WFQ

D. CQ

Is the description under (single) correct?

The GPON system inherits the TDM signal. The essence of the TDM signal is to encapsulate the TDM into a GEM frame on the ONU. The GEM frame is decapsulated into a TDM signal on the OLT, and then transmitted to the device capable of transmitting the TDM signal.

A. True

B. False

(multiple) Which of the following are commonly used positioning methods for Ethernet docking faults?

A. View port indicator status

B. Check the port configuration

C. Ping

D. Tracert

(single) Which of the following MA5600T/MA5680T boards can not provide optical ports?

A. GICG

B. SCUB

C. X1CA

D. ETHA

(multiple) In order to improve the efficiency of the upgrade, the DC tool is usually used for the upgrade. Which of the following operations does the DC tool support?

A. Save configuration files and database files

B. Backing up configuration files and database files

C. Upgrade and load the database file

D. Load the new version of the package file

(single) Regarding the MA5680T DHCP emulation test function, which of the following statements is incorrect?

A. The system can only support one-way simulation at the same time.

B. Execute in TSET mode

C. Only supports Layer 2 DHCP mode emulation, does not support Layer 3 RELAY emulation

D. The VLAN of the service flow cannot be QinQ, Stacking, subvlan.

(Radio) When deploying GPON Type C single attribution protection, the following description is correct.

A. The branch fiber breaks, and the state of the OLT's work port becomes standbY

B. Two ports protected by the OLT side cannot send and receive data at the same time

C. When the olt uplink fails, a protection reversal can be triggered

D. The service configuration of ONU access is completely identical to the configuration before protection