ELI5: Explain Like I'm 5

STM-1

STM-1 stands for Synchronous Transport Module level 1. Imagine you have a big box and lots of small boxes that need to go inside the big box to be sent somewhere far away. STM-1 is like the level of the big box that everything needs to fit into.

Inside the small boxes are bits of information, like letters in the alphabet. STM-1 makes sure all the boxes of information fit together perfectly, like a puzzle, so that the information is sent correctly without any missing or mixed-up bits.

It's important to have STM-1 because it helps keep the information organized and makes sure it arrives at its destination correctly. Just like how putting puzzles together can be fun and satisfying, STM-1 helps make sure all the pieces of information fit together perfectly!