Dear kamalf,
Thank you for your feedback again.:)
I told the post owner and she will reply you later.

Hi, Kamalf

Thanks for your feedback about the post.

The 4096QAM modulation scheme is supported only when AM is enabled and ATPC is disabled, and XPIC is disabled. RTN 910A should use the RTN XMC-3 ODU.

More conditions, please see RTN 910A Product Documentation on support Website.

you can click the links: http://support.huawei.com/hdx/hdx.do?docid=DOC1000092552&id=tc_rtn900_pd_0241&text=Microwave%2520Work%2520Modes%2520%2528ISM6%2520Board%2529&lang=en

Hope my answer be helpful to you.

Thanks

Good, clear and useful, thanks

Excellent documentation.