Telecom Basics (Part 2): Cell ID, ILD, and Call Detail Records
Readiness training. LEA.Training does not grant any official certificate, licence or authority.
This lesson builds on telecom basics. You will learn what a Cell ID is and how it supports location work, how international roaming and long-distance calls operate, and how to read and analyse a Call Detail Record.
Focus: understand Cell IDs, roaming/ILD, and CDRs well enough to see how they support an investigation — lawfully.
Learning objectives
- Explain what a Cell ID is and how it helps estimate a device's location.
- Describe international roaming and International Long-Distance (ILD), and why they matter to investigators.
- List the main parts of a Call Detail Record (CDR).
- Describe how CDRs are analysed, and the legal limits on their use.
This lesson opens when you enrol
Not on sale in the Australia edition yet. The first lesson stays free to read.
Already bought it? Sign in to open it in your classroom.
Video coming soon. The lesson text covers everything you need.
Learning Check
A short, untimed check for this lesson. It is not graded and does not count toward the final assessment. The check runs on the server: questions are sent one attempt at a time and answers are never sent to your browser before you submit.
Enrolled learners can download this lesson as a PDF in the classroom.