[OpenSBC] audio gets jittery and choppy and no rtp media on silence

[OpenSBC F. <ope...@op...>]

in recent times i have noticed that opensbc gets the audio jittery and choppy and rtp stream seems to stop on silence. Is there a way to define jitter buffer and keep a steady stream of rtp even on silence as i now mainly use it for encryption with freeswitch as the soft switch.