hi! I've created a interactive response group recently with options that the caller can select + playing the recorded voice. At the end of the voice recording playing, it will wait be quiet for more than 10 sec before it repeat itself. Is there anyway I can shorten that "waiting time" before it repeat playing the recorded option again?

I am afraid it is not possible. It is most likely to be controlled programmatically.

10 Seconds is the minimum timeout:

http://technet.microsoft.com/en-us/library/gg398989(v=ocs.14).aspx

TimeoutThreshold:
"Amount of time (in seconds) that a call can be in the queue before that call times out. At that point, the system will take the action specified by the TimeoutAction parameter.
The timeout threshold can be any integer value between 10 and 65535 seconds (approximately 18 hours), inclusive; the default value is null, meaning that the queue never times out."

• Edited by Michael LaMontagneMVP Thursday, May 09, 2013 2:11 PM
• Proposed as answer by Lisa.zhengMicrosoft contingent staff, Moderator Sunday, May 26, 2013 12:45 PM
• Marked as answer by Lisa.zhengMicrosoft contingent staff, Moderator Monday, May 27, 2013 1:29 PM

10 Seconds is the minimum timeout:

http://technet.microsoft.com/en-us/library/gg398989(v=ocs.14).aspx

TimeoutThreshold:
"Amount of time (in seconds) that a call can be in the queue before that call times out. At that point, the system will take the action specified by the TimeoutAction parameter.
The timeout threshold can be any integer value between 10 and 65535 seconds (approximately 18 hours), inclusive; the default value is null, meaning that the queue never times out."

• Edited by Michael LaMontagneMVP Thursday, May 09, 2013 2:11 PM
• Proposed as answer by Lisa.zhengMicrosoft contingent staff, Moderator Sunday, May 26, 2013 12:45 PM
• Marked as answer by Lisa.zhengMicrosoft contingent staff, Moderator Monday, May 27, 2013 1:29 PM

Michael, you're specifying the queue timeout in which case an action will occur like go to voicemail or send to another queue.  The OP (and me) would like to know if there is a way to shorten the time it takes for the IVR to repeat the greeting.  For me, on Lync 2013, it appears to be defaulting to 30 seconds of silence which is far too long.  Thanks!