What modulation mode is used for ADSL access in MA5600 products?

• A.AAL5
• B.CAP
• C.DMT
• D.PMT

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Which of the following statements are incorrect ?

• A.WDM1r multiplexers can be deployed close to the CO or user as required.
• B.GPON and XGS-PON have different rates but the same network architecture. Therefore, to ensure that the device supports XGS-PON, you only need to change the optical modules on an ONU.
• C.The deployment of WDM1r multiplexers does not affect the calculation of optical link attenuation.
• D.Because the center wavelengths of XGS-PON and GPON are different and do not overlap or conflict with each other, they can share an optical distribution network (ODN).

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The ONU connected to the GPON port can go online normally. However, when you run the display ont info command on the OLT to query the ONU information, "Match state" is displayed as mismatch. The possible causes are:

• A.The DBA parameters are set incorrectly.
• B.The ranging process is faulty during registration.
• C.The actual hardware capability of the ONU is inconsistent with the ONU service profile bound to the ONU.
• D.The ONU is offline.

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According to the H.248 protocol, what is the type of terminal occupied when the telephone terminal is off-hook?

• A.Persistent Terminal
• B.Temporary terminal
• C.Semi-permanent terminal
• D.Permanent terminal

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When maintaining or managing an OLT locally, you can log in to the system through the local serial port.
Which of the following port is connected to the RJ-45 connector of the RS-232 serial cable?

• A.CON port on the control board
• B.Network port of the maintenance PC
• C.ETH port on the control board
• D.ESC port on the control board

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