Obi100 - Ring Immediate - 10 -15 secs before audio

Hello all...

I have a Obi100 and notived a wierd issue after upgrading to the lastest firmware.

Using VOIP.MS or Freephoneline - if I call from a landline or cell phone to my Obi100 voip setup, the device rings immediately but I get no audio for sometimes up to 15 secs..... other times it might be as quick as 5 secs.

I have reset the configuration on the Oci100 and reapplied my setting but it makes no difference.

I used my older Linksys ATA and it does not have this issue....

Any ideas?

Cheers