I'm having trouble getting audio to work on an inbound PSTN-VOIP call. I believe the problem is that the SPA8800 is giving an odd number port for it's RTP port. The odd number port is confusing the voip software I need to use which receives the call. RTP ports should be even with the RTCP port being the odd numbered ports. Is there a way to force the spa8800 to assign ports correctly? Thanks.