Final answer:
A telephone call made from a TCC operator to a PSAP is known as a Test call, ensuring the emergency communication systems are functioning properly.
Step-by-step explanation:
A call usually made by telephone from a Telematics Call Center (TCC) operator to a Public Safety Answering Point (PSAP) is known as a Test call. This type of call is typically conducted to ensure that communications systems are functioning correctly and that the PSAP is ready to receive and handle emergency calls effectively. Regular test calls are essential for maintaining the safety and reliability of emergency communication systems.