At 07:33 AM 09-05-2017, gnorbury@bondcar.com [op25-dev] wrote:
>
>
>Suppose it depends at what point in time you start counting messages
>being exchanged. If the radio is already turned on and affiliated
>then there will be a single request and grant exchanged, otherwise
>there will be more messages.

Fairly hard for a turned off radio to PTT. Radios register and
affiliate as soon as they're turned on and dialed to a trunk
talkgroup. So PTT --> request --> grants.

>That said, from the perspective of someone passively monitoring the
>control channel for the purposes of listening to the chatter, mostly
>all they care about seeing is the grant and end messages.

The mythical end messages. Again, how would subscribers on a voice
channel see an end message on the control channel?