# Telecommunications Linking System **Aliases:** TLS **Entity class:** ICE telecommunications-analysis system ## Definition The **Telecommunications Linking System (TLS)** is an HSI analytical system for linking and analyzing telecommunications information in support of investigations. DHS documentation places it in the ICM architecture and identifies integration with [[wiki/PenLink|PenLink]]. ## Relationships - **used by:** [[wiki/Homeland Security Investigations|HSI]]. - **connected to:** [[wiki/Investigative Case Management|ICM]] and [[wiki/PenLink|PenLink]]. - **method:** telecommunications metadata analysis and [[wiki/Link Analysis|link analysis]]. ## Sources / Provenance - [DHS — ICM Privacy Impact Assessment, 2016](https://www.dhs.gov/sites/default/files/publications/privacy-pia-ice-icm-june2016.pdf)