Asterisk 1.8.3 100% cpu in Segate dockstar during gtalk call

I have successfully installed Asterisk on segate Dockstat. Asterisk is stable for past 5 days.
But one thing which concerns me is , while on call using Gtalk channel, the cpu utilization is 100%.
Is there are way way to optimize the CPU utilization ? … -1_arm.ipk

Any help, pointer is much appreciated.