In 1986, INEM (Instituto Nacional de Emergência Médica - National Institute of Medical Emergency) together with INESC/INOV, developed a communications system, for emergency situations on the Portuguese motorways.

In 1988, a new completely digital modular version was developed, leading to performance improvements, under the name SIT (Sistema Integrado de Telecomunicações - Integrated Telecommunications System) later registered under the name TELIS.

The product and knowledge were transferred to a company, SETCOM, which nowadays markets the system.

The Portuguese Motorway Operator (Brisa) uses TELIS in several main routes.

Main technical characteristics:

Operator:

• Interface with the operator with high detail and graphic quality of information.
  
• Permanent recording of data and dialogues.
  
• Intelligent re-configuration of the system in the network.
  

User:

• High reliability and robustness.
  
• Digital communication of voice and data, short answering times.
  
• Synthesised Voice for information to the customer and communications conditions.
  
• Detection and diagnosis of malfunction or violation.