asterisk users - Oct 2009 - question about getting instance ringing member in queue

Hi,

  I have a queue and 3 agents in the queue like below

SIP/1001
SIP/1002
SIP/1003

When I dial the queue number, the agent start to ring.  How can I get
the instance ringing agent as I want to pause the agent
(pausequeuemember) after the queue timeout?  Any application or
variable can use to get the ringing agent?
ango