2nd referee signal end of timeout

[daveg144]

I'm fairly new to volleyball officiating and I have a question regarding signaling the end of a timeout. I was trained to sound a long blast of the whistle at the end of the timeout. However, last week, a veteran official advised me to blow two short blasts instead. Her reasoning was that the server would not accidently confuse that with the call to serve.

Your thoughts?

Thanks for the replies.