Tag: IAE (input Alignment Error) events

OTN – Lesson 9 – Video 1 – OTU Layer Source Direction – Part 1

This post presents the first of 11 Videos that covers training on Performance Monitoring at the OTU-Layer. This post focuses on the Source-Direction OTU-Layer Atomic Functions.

OTN – Lesson 9 – Video 1 – OTU Layer Source Direction Circuitry/Functionality – Part 1

This blog post contains a video that begins the discussion of the OTU-Layer Source Direction circuitry.

In particular, this video discusses the following Atomic Functions:

  • The OTUk/ODUk_A_So Atomic Function, and
  • The OTUk_TT_So Atomic Function.

The Role of the OTUk/ODUk_A_So Function

In short, the OTUk/ODUk_A_So Atomic Function is responsible for taking an ODUk client signal and mapping it into an OTUk server signal.

As the OTUk/ODUk_A_So Atomic function generate this OTUk server signal, it will insert default values for the OTUk Overhead fields, into its outbound OTU data-stream.

The Role of the OTUk_TT_So Function

The OTUk_TT_So Atomic Function will accept the OTU data-stream (from the upstream OTUk/ODUk_A_So Function) and will compute real (and correct) values for the OTU Overhead fields.

Continue reading “OTN – Lesson 9 – Video 1 – OTU Layer Source Direction – Part 1”