04.143GPPIndividual equipment type requirements and interworkingSpecial conformance testing functionsTS

Purpose: to determine the routing of speech data (DAI or internal, i.e. normal mode) and which device is being tested (speech transcoder / DTX functions or A/D & D/A).

Prerequisites: a dedicated channel must be established if the manufacturer has stated that the DAI is activated by means of the layer 3 message.

Procedure: the SS sends a TEST_INTERFACE message if the manufacturer has stated that the DAI is activated by means of the layer 3 message or applies the appropriate control signal on the DAI if the manufacturer has declared that the DAI is activated this way.

When the test mode is established i.e. speech data comes from test interface, each new test function overrides the previous one.