Try setting the "record_waste_resources=true" option in your voicemail rules in the dial plan.

-- Nathan

From: freeswitch-users-bounces@lists.freeswitch.org [freeswitch-users-bounces@lists.freeswitch.org] on behalf of Yuriy Nasida [nasida@live.ru]
Sent: Thursday, June 06, 2013 4:19 AM
To: freeswitch-users@lists.freeswitch.org
Subject: [Freeswitch-users] mod_voicemail + send_silence_when_idle

Hi guys,

One of my carriers drops a call if FS deos not send RTP media (10-20 sec). Thus issues happens, when voicemail module asks to leave a message. I tried to use send_silence_when_idle. I hear a noise from FS but not in the moment of recording...

Please advice,

Thank.