Well ont eject all the way out - Samsung VR3607 VHS VCR

You need check your ONT or router if it has a problem. You can try to reboot them and then check again.

https://xponshop.com/collections/huawei-2-4g-wifi-ont/products/huawei-eg8141a5-ont

There are different ranges of ONT's optical power i.e
For the ONTs using GPON upstream transmission: -27 dBm to -8 dBm (Class B+); -30 dBm to -8dBm (Class C+).For the ONTs using XG-PON upstream transmission: -28dBm to -8dBm(Class N1a); -28dBm to -8dBm(Class N2a).
CISI exam help

1. 4K VLANs are supported on theHuawei OLT.
2. VLANs supported by the ONT at L2 are as follows: If the version of the ONT is V800R105C32B023/B036, only eight VLANs are supported on the ONT. The cause is that the PMC chip maintains a maximum of eight switch entries when the ONT is in the translation mode.
If the version of the ONT is V800R105C32B056, the ONT can work in the new transparent mode and the ONT supports up to 256 VLANs in this mode

Clearing ONT data is similar to restoring factory settings for an ONT. Use either of the following methods to restore factory settings for an ONT:
Choose System Tools > Restore Default Configuration from the main menu on the web page and click Restore Default Configuration.
Hold down the RESET button for a long period of time (longer than 10s) to restart the ONT with factory settings.

The Huawei ONTs with a name ended with "D" or "Q" support dual-band Wi-Fi, such as the HG8245D and HG8245Q, currently hot model is Huawei HG8245Q2.
XG-PON gateway type ONTs support dual-band Wi-Fi, such as the HN8055Q and HN8245Q.

No, Huawei ONT HG8310 can't configure SNMP by it self. It belongs to A class ONT which can only configure SNMP by using OLT U200NMS Huawei ONT Thunder link com

Yes, it can be compatible, if Huawei GPFD board with B+ SFP modules, it doesn't effect if the ONT (Huawei HG8546M) with B+ or C+ modules.

Query the ONT nameplate to determine whether an ONT supports routing. If "gateway HGU" is marked on an ONT nameplate, the ONT is of the gateway type and supports routing. If "bridging SFU" is marked on an ONT nameplate, the ONT is of the bridging type and does not support routing.

You must remove the CD player from the dash and send it out for repair by a factory approved repair center. Parts and repair info is not made available to the public by any manufacturer.