Hi friend.
H836VCLE is a 32-channel VDSL2 over POTS service board that provides the VDSL2 over POTS access service. It has an embedded splitter with 600-ohm impedance.
VDSL2 over POTS service board. This board is a broadband board. Voice services are transmitted only through the pass-through board. Therefore, this board cannot be used as a voice board.

The basic working principles of the H836VCLE board are as follows:
The chipset module implements functions, such as amplification, filtering, A/D, and D/A conversion, coding/decoding, and encapsulation/decapsulation for signals.
The protection module protects and isolates the board from lightning strikes.
The control module decodes signals and monitors signals.
The splitter module separates POTS signals from combined signals (VDSL2 signals and POTS signals).
The power module supplies power to other function modules of the board.
The clock module provides the working clock for other functional modules of the board.
I hope I can help you!