# Activating call diversion (ETS 300)

To activate the call diversion service for an address, the application sends an acu_ss_act_divert_invoke extended data structure to the stack in an ACU request message using the ACU_MGMT_SAPI.

## Successful call diversion activation request (ETS 300)

If the invocation is successful, the stack responds with an ACU indication message using the ACU_MGMT_SAPI. This message contains an acu_ss_act_divert_ret_result extended data structure.

## Unsuccessful call diversion activation request (ETS 300)

If the invocation is not successful, the stack responds with an ACU indication message using the ACU_MGMT_SAPI. This message contains an acu_ss_act_divert_ret_error extended data structure.