Which of the following statements is true about the facility code?
AO
BO
CO
DO
It is a number between 0 and 30 that identifies the type of device sending the message.
It is a number between 0 and 23 that identifies the type of device sending the message.
It is a number between 0 and 27 that identifies the type of device sending the message.
It is a number between 0 and 25 that identifies the type of device sending the message.