The preferred codec was G711U
STUN was enabled and uses STUN.VOIPCHEAP.COM
No there was no optimization set for Pfingo.
By the way not just Pfingo, a local VoIP provider is also used which is Aglow (
Aglow Alicom - Singapore Largest Store and Forward Fax Provider) with the same result.
Someone just called me on 968032 but we were cut off midway, please call again, I would love to discuss this matter