[asterisk-users] Don't enter a queue if no one is logged in

[Peter Pauly]

I currently have the following setup:

exten => 2000,1,Playback(/var/lib/asterisk/sounds/Greeting)
exten => 2000,2,Queue(Qabcdef|t)
exten => 2000,3,Playback(/var/lib/asterisk/sounds/EveryonesBusy)
exten => 2000,4,Hangup
exten => 2000,103,Hangup

What happens is, that the greeting in step one is played regardless if
anyone is logged into the queue. So immediately after the greet, we
tell them we can't help them.

What I would like is to check first to see if there is anyone logged
into the queue, and then play the greeting. Is this possible? Is there
a function that checks if anyone is logged in?