Ports supported by the MU04 boards on NG SDH devices

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The MU04 boards support SMB electrical ports.

Other related questions:
Whether the TDX board on the OSN 8800 can be interconnected with the SL64 board on an NG SDH NE
Yes, the two boards can be interconnected through STM-64 optical ports.

Whether system control boards are required when NG WDM devices are used as slave subracks
1. OSN 8800 subracks are classified into T16, T32, T64, platform subracks, and universal platform subracks (UPSs). Principles for configuring system control boards on OptiX OSN 8800 T16 subracks: For electrical subracks, TN16XCH or TN16UXCM boards must be configured. For optical subracks (master subrack), the TN16SCC board must be configured. For optical subracks (slave subracks), no system control boards need to be configured. Principles for configuring system control boards on OptiX OSN 8800 platform subracks and UPSs: For the master subrack, system control boards must be configured. For slave subracks, no system control boards need to be configured. Principles for configuring system control boards on other OptiX OSN 8800 subracks: System control boards must be configured on both the master and slave subracks. 2. OptiX OSN 9800 subracks are classified into U16, U32, U64, P18, and UPSs. CTU system control boards must be configured on the U16, U32, and U64 subracks of OptiX OSN 9800. 52SCC boards must be configured for OptiX OSN 9800 P18 subracks and UPSs. Principles for configuring system control boards: For the master subrack, system control boards must be configured. For slave subracks, no system control boards need to be configured. 3. System control boards must be configured on both the master and slave subracks of OptiX OSN 6800.

Whether the DCC channels of an SDH device can be disabled through OTU boards on an OTN device
GCC channels on OTU boards in OptiX OSN 6800 are electrical supervisory channels. The enable status of GCC channels does not adversely affect DCC byte transmission on an SDH NE.

Method used to restore the database package for a non-ASON NG SDH NE
Question: During restoration of the database package on a non-ASON NG SDH NE, some services are interrupted after the database package is downloaded. As a result, alarms such as AU_AIS, TU_AIS, and HP_UNEQ are generated. Is there any method for preventing services from being interrupted during database package restoration? Analysis: During database package restoration, if you choose to issue configuration data to boards and the configuration data in the database is different from that on system control boards and cross-connect boards, services will be interrupted. Answer: 1. Before restoring the database package, collect the basic configuration information of the NE. 2. Select Restart for the activation type. Do not select the option for issuing configurations to boards. 3. After the restoration is completed, collect the basic configuration information of the NE again, and compare the collected data with the previously collected one. 4. If the data is consistent, perform a warm reset on cross-connect boards and service boards in sequence. 5. If the data is inconsistent, find out the missing services or modified services based on the data collected before restoration to create a configuration script, and configure the services separately. When the data is consistent with that collected before restoration, perform a warm reset on cross-connect boards and service boards in sequence. 6. Check whether services are interrupted. Suggestion and conclusion: Restoring the database package is a high-risk operation. Therefore, perform operations following the requirements.

Reasons for pointer justification on an SDH line board
Reasons for pointer justification on an SDH line board: The reason why pointer justification occurs on an SDH line board is that NE clocks are not synchronized. When the rate (frame rate) of VC-4 is higher than that of AU-4, a negative pointer justification occurs. When the rate of VC-4 is lower than that of AU-4, a positive pointer justification occurs.

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