About packet saver.
Be aware, only works if you have several calls from one quintum to another, both of them with packetsaver option enabled.
If you get eight calls to eight diferent providers or gateways, there is no savings.
Same if you send calls to any non-quintum provider.
The only thing that packetsaver does is combining the overhead of several calls into a unique overhead.
Kind of a SS7 of Quintum VOIP.