[Freeswitch-users] Delay in Voicemai's MWI NOTIFY

Hi all, Is there any way I can configure FreeSWITCH, to send NOTIFY for Voicemail's MWI to registered phones whenever new vm comes or deleted? The issue is that FreeSWITCH sends NOTIFY to update mailbox status only when phone re-register. One way I can decrease the register expiry time on phones. But It seems not proper way. I think NOTIFY should be sent independently when message get received or deleted. Regards, MohammedShehzad