6.2 ECHO U.K.
This clause contains provisions specifically made to test only that the DSRC-REDCR >>-:-<DSRC-VU is functionally active.
The objective of the ECHO command is to enable workshops or type approval test facilities to test that the DSRC link is working without needing access to security credentials. The tester's equipment therefore only needs to be able to initialise a DSRC communication (sending a BST with AID=2) and then send the ECHO command, and, assuming the DSRC is working, will receive the ECHO response. See 5.4.8 for details. Assuming it receives this response correctly, the DSRC link (DSRC-REDCR >>-:-<DSRC-VU) may be validated as functioning correctly.