Which of the following boards is NOT a PCM board?

The correct answer isTTA. TheTTA boardisnota PCM (Pulse Code Modulation) board; it is typically

used for other purposes, such as Ethernet switching or aggregation.

Here’s an overview of the options:

DXM:A PCM board used for digital cross-connect and multiplexing in optical networks.

AT8:A PCM board that supports analog-to-digital conversion for voice and data services.

TTA: Not a PCM board; it is often used for Ethernet switching or aggregation in access networks.

FXSO12:A PCM board that provides interfaces for analog voice and data services.

PCM boards are essential for converting analog signals into digital format and vice versa, enabling

efficient transmission over digital networks. The TTA board, however, serves a different purpose and

is not classified as a PCM board.

Reference:

Huawei PCM Board Specifications

ITU-T G.703 Standards for PCM