Emergency Call (eCall) is a service provided in Europe with the goal of reducing response times for accidents or other emergencies on the roadways. When accidents occur, a call is placed automatically to the emergency number and essential information is collected and transmitted by the in-vehicle system (IVS) via GSM or WCDMA to the public safety answering point (PSAP). This application note describes the principles behind eCall and presents conformance tests for eCall using test solutions offered by Rohde & Schwarz. A test software for eCall makes it quick and easy to perform these tests with the GSM or WCDMA wireless communications standard.