### Instruction:

Extract the cause and effect entities from the following sentence:
If the system is not able to connect the call, an audible and visual indication shall be provided to the driver that the call was not received by the controller

### Assistant:

VARIABLE: visual indication
NEGATION: is not
CONDITION: shall be provided to the driver that the call was not received by the controller
KEYWORD: If
CAUSE_1: the system is not able to connect the call
AND: and
EFFECT_1: an audible
EFFECT_2: visual indication shall be provided to the driver that the call was not received by the controller

